Inventor

David P. Rossum

Inventor

Aptos, CA, US

Overview

1976–2021

Patent span

Physics

Primary field (CPC G)

Patents· 42 as inventor

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

G10Hprimary

G10HElectrophonic musical instruments37%

H03HImpedance networks, e.g. resonant circuits13%

G06FElectric digital data processing11%

H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers10%

G10LSpeech analysis techniques or speech synthesis8%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%

H04LTransmission of digital information, e.g. telegraphic communication3%

G09BEducational or demonstration appliances2%

H03GControl of amplification2%

H03KPulse technique2%

PatentTitleYear

11,087,732Oscillatory timbres for musical synthesis through synchronous ring modulation2021 11,029,914Multi-core audio processor with phase coherency2021 10,514,883Multi-channel morphing digital audio filter2019 10,469,967Utilizing digital microphones for low power keyword detection and noise suppression2019 10,045,140Utilizing digital microphones for low power keyword detection and noise suppression2018 9,711,144'Microphone apparatus and method with catch-up buffer'2017 9,478,234'Microphone apparatus and method with catch-up buffer'2016 9,337,805'Efficient digital microphone decimation filter architecture'2016 9,236,874'Reducing data transition rates between analog and digital chips'2016 8,965,942'Systems and methods for sample rate tracking'2015 8,618,961'Sample rate conversion using infinite impulse response filters'2013 7,280,878'Sample rate converter having distributed filtering'2007 7,248,934'Method of transmitting a one-dimensional signal using a two-dimensional analog medium'2007 6,858,790'Digital sampling instrument employing cache memory'2005 6,622,207'Interpolation looping of prioritized audio samples in cache connected to system bus'2003 6,365,816'Digital sampling instrument employing cache memory'2002 6,324,235'Asynchronous sample rate tracker'2001 6,137,043'Digital sampling instrument employing cache memory'2000 6,138,207'Interpolation looping of audio samples in cache connected to system bus with prioritization and modification of bus transfers in accordance with loop ends and minimum block sizes'2000 6,091,269'Method and apparatus for creating different waveforms when synthesizing musical sounds'2000 6,092,126'Asynchronous sample rate tracker with multiple tracking modes'2000 6,016,522'System for switching between buffers when receiving bursty audio by computing loop jump indicator plus loop start address for read operations in selected buffer'2000 5,943,427'Method and apparatus for three dimensional audio spatialization'1999 5,928,342'Audio effects processor integrated on a single chip with a multiport memory onto which multiple asynchronous digital sound samples can be concurrently loaded'1999 5,925,841'Digital sampling instrument employing cache memory'1999 5,900,570'Method and apparatus for synthesizing musical sounds by frequency modulation using a filter'1999 5,864,876'DMA device with local page table'1999 5,763,800'Method and apparatus for formatting digital audio data'1998 5,698,803'Digital sampling instrument employing cache memory'1997 5,698,807'Digital sampling instrument'1997 5,342,990'Digital sampling instrument employing cache-memory'1994 5,303,309'Digital sampling instrument'1994 5,248,845'Digital sampling instrument'1993 5,170,369'Dynamic digital IIR audio filter and method which provides dynamic digital filtering for audio signals'1992 5,144,676'Digital sampling instrument'1992 5,111,727'Digital sampling instrument for digital audio data'1992 5,072,645'Output stage for a multitimbral electronic musical instrument providing automatic detection of the use of submix outputs'1991 4,987,600'Digital sampling instrument'1991 4,506,579'Electronic musical instrument'1985 4,404,529'Lowpass filter with electronic control of cutoff and resonance'1983 3,986,423'Polyphonic music synthesizer'1976 3,969,682'Circuit for dynamic control of phase shift'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983–2015Patents assigned to ROSSUM DAVID P (3)· patent assignee history

1985–1997Patents assigned to E MU SYSTEMS INC (10)· patent assignee history

1985–1994Based in Long Beach, CA, US· patent location history

1991–2021Based in Santa Cruz, CA, US· patent location history

1992–2002Based in Aptos, CA, US· patent location history

1997–2016Patents assigned to CREATIVE TECH LTD (18)· patent assignee history

1999–2007Based in Monterey, CA, US· patent location history

2013–2016Patents assigned to AUDIENCE INC (3)· patent assignee history

2016–2021Patents assigned to KNOWLES ELECTRONICS LLC (5)· patent assignee history

2017–2021Based in Mountain View, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CREATIVE TECH LTD	18	1997–2016
E MU SYSTEMS INC	10	1985–1997
KNOWLES ELECTRONICS LLC	5	2016–2021
AUDIENCE INC	3	2013–2016
ROSSUM DAVID Pself	3	1983–2015

Locations

Location	Patents	Span
Aptos, California, US	14	1992–2002
Santa Cruz, California, US	11	1991–2021
Monterey, California, US	8	1999–2007
Long Beach, California, US	4	1985–1994
Mountain View, California, US	2	2017–2021