Inventor

Allen LeRoy Limberg

Inventor

Vienna, VA, US

Overview

1976–2020

Patent span

Electricity

Primary field (CPC H)

Patents· 151 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Nprimary

H04NPictorial communication, e.g. television38%

H04LTransmission of digital information, e.g. telegraphic communication30%

H03DDemodulation or transference of modulation from one carrier to another8%

H04BTransmission7%

H03MCoding6%

H03FAmplifiers2%

H03JTuning resonant circuits2%

H04HBroadcast communication2%

G06TImage data processing or generation, in general1%

H03HImpedance networks, e.g. resonant circuits1%

PatentTitleYear

10,637,711COFDM DCM communications systems with preferred labeling diversity formats2020 10,594,537Receivers for COFDM signals conveying the same data in lower- and upper-frequency sidebands2020 10,171,280Double-sideband COFDM signal receivers that demodulate unfolded frequency spectrum2019 9,762,360'Digital television broadcasting system using coded orthogonal frequency-division modulation with multilevel low-density-parity-check coding'2017 9,647,865'Iterative-diversity COFDM broadcasting with improved shaping gain'2017 9,497,056'Conveying metadata by modulation of pilot carriers in COFDM broadcasting'2016 9,253,428'Broadcasting system with digital television signals and metadata that modulate respective sets of OFDM carriers'2016 9,143,785'COFDM broadcast systems employing turbo coding'2015 9,143,375'Iterative-diversity COFDM broadcasting with improved shaping gain'2015 9,124,396'COFDM digital television receivers for iterative-diversity reception'2015 9,118,352'Remedying low densities of ONEs in transmission and reception of digital television signals'2015 8,958,490'COFDM broadcasting with single-time retransmission of COFDM symbols'2015 8,781,010'Utilization of Reed-Solomon coding in mobile/hand-held digital television receivers'2014 8,718,189'Digital broadcasting systems using parallel concatenated coding of bit-complementary bitstreams'2014 8,699,622'Methods and apparatuses for implementing selective interference-filter pre-coding of main-service 8-VSB DTV signals'2014 8,649,429'Systems for reducing adverse effects of deep fades in DTV signals designed for mobile reception'2014 8,441,581'Slot-interleaved decoding of concatenated convolutional coding in mobile/hand-held digital television receivers'2013 8,416,888'Coding and decoding of 8-VSB digital television signals for mobile/handheld receivers'2013 8,418,022'Utilization of non-systematic (207, 187) Reed-Solomon coding in mobile/hand-held digital television receivers'2013 8,413,012'Burst-error correction methods and apparatuses for wireless digital communications systems'2013 8,411,761'Sub-channel acquisition in a digital television receiver designed to receive mobile/handheld signals'2013 8,406,338'Terminated concatenated convolutional coding of M/H group data in 8VSB digital television signals'2013 8,386,896'8VSB DTV signals with PCCC and subsequent trellis coding'2013 8,311,141'Time-dependent trellis coding for more robust digital television signals'2012 8,301,973'Digital television systems employing concatenated convolutional coded data'2012 8,290,060'Staggercasting of DTV signals that employ concatenated convolutional coding'2012 8,290,035'Systems for reducing adverse effects of deep fades in DTV signals designed for mobile reception'2012 8,284,832'System for digital television broadcasting using modified 2/3 trellis coding'2012 8,271,849'M/H frame encoding and decoding techniques for 8VSB DTV broadcasting systems'2012 8,265,129'Digital receiver with system for controlling the operating mode of an adaptive equalizer'2012 8,196,007'Frequency-diversity 8-VSB AM broadcasting to mobile/handheld receivers'2012 8,179,982'Transmitting additional information in the headers of encapsulating data packets in mobile/handheld (M/H) DTV signals'2012 8,179,980'Robust DTV signals that can overcome burst errors up to 1040 bytes or more in length'2012 8,149,939'System of robust DTV signal transmissions that legacy DTV receivers will disregard'2012 8,116,400'Apparatus for adapting reception modes of a mobile DTV receiver in response to signaling'2012 8,111,769'Transmissions with reduced code rate in 8VSB digital television'2012 8,065,594'8VSB DTV signals with PCCC and subsequent trellis coding'2011 8,005,166'System for digital television broadcasting using modified 2/3 trellis coding'2011 7,957,490'Insertion of repetitive PN sequences into DTV data fields'2011 7,945,844'Robust DTV signals transmitted at two thirds the code rate of ordinary 8VSB DTV signals'2011 RE042301'Robust signal transmission in digital television broadcasting'2011 7,668,250'Time-dependent trellis coding for more robust digital television signals'2010 7,668,257'Transmissions with reduced code rate in 8VSB digital television'2010 7,492,835'Synchrodyning apparatus'2009 7,197,685'Robust signal transmission in digital television broadcasting'2007 7,151,797'Adaptive K-factor-improvement filter for receiver of radio signals subject to multipath distortion'2006 7,038,732'DTV signal with GCR components in plural-data-segment frame headers and receiver apparatus for such signal'2006 6,950,481'Digital television receiver converting vestigial-sideband signals to double-sideband AM signals before'2005 6,803,970'Digital television receiver with match filter responsive to field synchronization code'2004 6,771,707'Digital television receiver converting vestigial-sideband signals to double-sideband AM signals before demodulation'2004 6,760,078'Digital filtering of DTV I-F signal to avoid low-end boost of the baseband signal resulting from in-phase synchrodyne'2004 RE038456'Decimation of baseband DTV signals prior to channel equalization in digital television signal receivers'2004 6,687,313'Digital television receiver converting vestigial-sideband signals to double-sideband AM signals before demodulation'2004 6,667,760'Receiver for digital television signals having carriers near upper frequency boundaries of TV broadcasting channels'2003 6,643,334'Bandpass tracker for DTV receiver, with VSB I-F signal filtered for more symmetrical AFPC Loop response'2003 6,621,527'Digital receiver with match filter responsive to field synchronization code in the final I-F signal envelope'2003 6,608,869'Dual-carrier heterodyne for separating orthogonal components of complex amplitude-modulation signals'2003 6,606,129'Digital filtering of DTV I-F signal to avoid low-end boost of the baseband signal resulting from in-phase synchrodyne'2003 6,545,728'Digital television receivers that digitize final I-F signals resulting from triple-conversion'2003 6,535,553'Passband equalizers with filter coefficients calculated from modulated carrier signals'2003 6,519,304'Circuitry operative on selected symbol slicing results for synchronizing data fields in a digital television receiver'2003 6,519,416'Magnet recording/reproducing apparatus with video camera, suited for photorecording without attending camera operator'2003 6,519,295'VSB DTV receiver with real-only digital synchrodyne to recover baseband symbol code'2003 6,512,555'Radio receiver for vestigal-sideband amplitude-modulation digital television signals'2003 6,507,626'Bandpass phase tracker that automatically samples at prescribed carrier phases when digitizing VSB I-F signal'2003 6,496,229'TV receiver using read-only memory shared during VSB and QAM reception for synchrodyning I-F signal to baseband'2002 6,496,230'Digital TV signal receiver with direct conversion from UHF I-F to Low-Band I-F before digital demodulation'2002 6,480,236'Envelope detection of PN sequences accompanying VSB signal to control operation of QAM/VSB DTV receiver'2002 6,480,233'NTSC co-channel interference detectors responsive to received Q-channel signals in digital TV signal receivers'2002 6,449,325'Circuitry operative on selected symbol slicing results for synchronizing data fields in a digital television receiver'2002 6,445,425'Automatic fine tuning of receiver for digital television signals'2002 6,441,843'Suppression of effects of co-channel NTSC interference artifacts upon digital TV receiver adaptive equalizer'2002 6,426,780'DTV receiver with low-band final I-F signal filtered for suppressing co-channel interfering NTSC audio carrier'2002 6,421,403'Baseband equalization of quadrature-phase as well as in-phase synchrodyne results in digital radio receivers'2002 6,400,393'DTV receiver with filter in I-F circuitry to suppress FM sound carrier of NTSC Co-channel interfering signal'2002 6,384,858'Suppression of co-channel NTSC interference artifacts when extracting training signal for a DTV receiver equalizer'2002 6,380,969'DTV receiver symbol decoding circuitry with co-channel NTSC artifacts suppression filter before data slicer'2002 6,377,312'Adaptive fractionally spaced equalizer for received radio transmissions with digital content, such as DTV signals'2002 6,351,290'Television receiver with separate I-F amplifiers for VSB and QAM digital TV signals that are digitally synchrodyned'2002 6,333,767'Radio receivers for receiving both VSB and QAM digital television signals with carriers offset by 2.69 MHz'2001 6,313,885'DTV receiver with baseband equalization filters for QAM signal and for VSB signal which employ common elements'2001 6,313,882'TV reception apparatus using same ghost-cancellation circuitry for receiving different types of TV signals'2001 6,307,595'NTSC/DTV reception apparatus automatically conditioned for NTSC signal reception responsive to 4.5 MHz intercarrier'2001 6,307,598'Plural-conversion TV receiver converting 1st I-F to 2nd I-F using oscillations of fixed frequency above 1st I-F.'2001 6,301,312'Bandpass phase tracker with hilbert transformation before analog-to-digital conversion'2001 6,300,984'Ghost-cancellation reference signals using spaced PN sequences'2001 6,246,827'Deemphasis and subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal'2001 6,211,924'Decimation of baseband DTV signal prior to channel equalization in digital television signal receivers'2001 6,201,564'Method of operating the channel equalizer in a receiver for DTV signals subject to co-channel NTSC interference'2001 6,188,441'Detection of PN sequences accompanying VSB signal to control operating mode of QAM/VSB DTV signal receiver'2001 6,184,921'Method for transmitting VSB digital TV with carrier frequency near co-channel NTSC audio carrier frequency'2001 6,184,942'Adaptively receiving digital television signals transmitted in various formats'2001 6,137,545'Reception mode control in radio receivers for receiving both VSB and QAM digital television signals'2000 6,124,898'Digital television receiver with equalization performed on digital intermediate-frequency signals'2000 6,118,495'Training signal in plural PN sequences near beginnings of data segments of DTV signal or scan lines of NTSC signal'2000 6,108,049'Circuitry operative on symbol decoding results for synchronizing data fields in a digital television receiver'2000 6,104,763'Synchrodyning of VSB and QAM final I-F signals supplied by separate converters in a QAM/VSB digital TV receiver'2000 6,104,442'Radio receiver for receiving both VSB and QAM digital HDTV signals'2000 6,081,301'DTV circuitry for measuring multipath distortion based on ghosting of data segment synchronizing signals'2000 6,061,096'Digital-and-analog-TV-signal receivers, each with single first detector and shared high-band I-F amplification'2000 6,057,877'NTSC interference detectors using pairs of comb filters with zero-frequency responses, as for DTV receivers'2000 6,023,306'NTSC interference detectors using comb filters that suppress digital TV pilot carrier for NTSC extraction'2000 6,005,642'Television receiver with doors for its display screen which doors contain loudspeakers'1999 5,999,223'System for controlling the operating mode of an adaptive equalizer within a digital TV signal receiver'1999 5,995,135'Digital television receiver with adaptive filter circuitry for suppressing NTSC Co-channel interference'1999 5,982,820'Bandpass phase tracker with hilbert transformation before plural-phase analog-to-digital conversion'1999 5,982,457'Radio receiver detecting digital and analog television radio-frequency signals with single first detector'1999 5,966,188'Decimation of baseband DTV signals prior to channel equalization in digital television signal receivers'1999 5,959,699'Reception mode control in radio receivers for receiving both VSB and QAM digital television signals'1999 5,923,378'Using intercarrier signals for detecting NTSC interference in digital TV receivers'1999 5,901,175'Dynamically adaptive equalizer system and method'1999 5,852,476'Using special NTSC receiver to detect when co-channel interfering NTSC signal accompanies a digital tv signal'1998 5,835,131'Digital television receiver with adaptive filter circuitry for suppressing NTSC co-channel interference'1998 5,805,241'Noise-immune automatic gain control for QAM radio receivers'1998 5,801,790'Using video signals from auxiliary analog TV receivers for detecting NTSC interference in digital TV receivers'1998 5,798,803'NTSC interference detectors using comb filters that suppress HDTV pilot carrier for NTSC extraction'1998 5,786,870'NTSC video signal receivers with reduced sensitivity to interference from co-channel digital television signals'1998 5,748,226'Digital television receiver with adaptive filter circuitry for suppressing NTSC co-channel interference'1998 5,731,848'Digital VSB detector with bandpass phase tracker using Ng filters, as for use in an HDTV receiver'1998 5,715,012'Radio receivers for receiving both VSB and QAM digital HDTV signals'1998 5,675,332'Plural-step chunk-at-a-time decoder for variable-length codes of Huffman type'1997 5,675,426'Television receiver with doors for its display screen which doors contain loudspeakers'1997 5,673,355'Deemphasis & Subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal'1997 5,659,372'Digital TV detector responding to final-IF signal with vestigial sideband below full sideband in frequency'1997 5,646,698'Pre-frame-comb as well as \"pre-line-comb\" partial-response filtering of BPSK buried in a TV signal'1997 5,636,252'Automatic gain control of radio receiver for receiving digital high-definition television signals'1997 5,606,579'Digital VSB detector with final IF carrier at submultiple of symbol rate, as for HDTV receiver'1997 5,604,551'Magnetic recording/reproducing apparatus with video camera, suited for photorecording without attending camera operator'1997 5,596,418'Deemphasis and subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal'1997 5,565,930'Receiver with oversampling analog-to-digital conversion for digital signals accompanied by analog TV signals'1996 5,563,664'Pre-frame-comb as well as pre-line-comb partial-response filtering of BPSK buried in a TV signal'1996 5,555,024'Transmitters for burying digital signals within the trace and retrace intervals of NTSC television signals'1996 5,548,617'Digital VSB detector with bandpass phase tracker using rader filters, as for use in an HDTV receiver'1996 5,510,845'Receivers for digital signals buried within the trace and retrace intervals of NTSC television signals'1996 5,506,636'HDTV signal receiver with imaginary-sample-presence detector for QAM/VSB mode selection'1996 5,500,739'Frequency-multiplexing FM luma signal with color and 2nd under signals having overlapping frequency spectra'1996 5,497,205'Apparatus for processing BPSK signal transmitted with NTSC TV on quadrature-phase video'1996 5,479,449'Digital VSB detector with bandpass phase tracker, as for inclusion in an HDTV receiver.'1995 5,461,426'Apparatus for processing modified NTSC television signals, with digital signals buried therewithin'1995 5,448,299'Apparatus for processing BPSK signals transmitted with NTSC TV on quadrature-phase video carrier'1995 4,731,656'Solid state imager with transfer smear suppression for moving and stationary images'1988 4,602,275'Television memory system'1986 4,528,586'Automatic tint correction with reduced color saturation error'1985 4,437,764'Electrical compensation for misregistration of striped color filter in a color imager with discrete sampling elements'1984 4,420,726'Voltage-followers with low offset voltages'1983 4,389,619'Adjustable-gain current amplifier for temperature-independent trimming'1983 4,250,461'Current mirror amplifier'1981 4,103,246'Switchable current amplifier'1978 4,057,743'Current sensing circuit'1977 4,030,042'Feedback amplifiers'1977 3,942,046'Low output impedance voltage divider network'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1988Patents assigned to RCA CORP (11)· patent assignee history

1977–1988Based in Hopewell Township, Mercer County, NJ, US· patent location history

1995–2013Patents assigned to SAMSUNG ELECTRONICS CO LTD (107)· patent assignee history

1995–2001Based in Ringoes, NJ, US· patent location history

1996–2000Patents assigned to SAMSUNG ELCTRONICS CO LTD (2)· patent assignee history

1996–2006Based in Vienna, VA, US· patent location history

1998–2012Based in Fairfax, VA, US· patent location history

2006–2020Patents assigned to LIMBERG ALLEN LEROY (41)· patent assignee history

2007–2020Based in Port Charlotte, FL, US· patent location history

2016Patents assigned to ALLISON III ARTHUR WEBB (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SAMSUNG ELECTRONICS CO LTD	107	1995–2013
LIMBERG ALLEN LEROYself	41	2006–2020
RCA CORP	11	1976–1988
ALLISON III ARTHUR WEBB	2	2016
SAMSUNG ELCTRONICS CO LTD	2	1996–2000

Locations

Location	Patents	Span
Vienna, Virginia, US	72	1996–2006
Port Charlotte, Florida, US	44	2007–2020
Ringoes, New Jersey, US	14	1995–2001
Fairfax, Virginia, US	10	1998–2012
Hopewell Township, Mercer County, New Jersey, US	5	1977–1988