Inventor

Sadahiko Yamashita

Inventor

Sagamihara, JP

Overview

33→

Patents

1977–1988

Patent span

Electricity

Primary field (CPC H)

Patents· 33 as inventor

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

H01Pprimary

H01PWaveguides38%

H03DDemodulation or transference of modulation from one carrier to another22%

H03BGeneration of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner11%

H03JTuning resonant circuits11%

H03HImpedance networks, e.g. resonant circuits4%

G01SRadio direction-finding2%

H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses2%

H04BTransmission2%

H04NPictorial communication, e.g. television2%

H05KPrinted circuits2%

PatentTitleYear

4,726,072'Double converter tuner'1988 4,720,688'Frequency synthesizer'1988 4,679,003'Frequency divider circuit and frequency synthesizer using the same'1987 4,661,998'Double superheterodyne tuner'1987 4,651,344'VHF-UHF mixer having a balun'1987 4,638,180'Frequency divider circuits'1987 4,631,506'Frequency-adjustable coaxial dielectric resonator and filter using the same'1986 4,592,095'Microwave FET mixer arranged to receive RF input at gate electrode'1986 4,590,443'Transistor oscillator with compensating circuit for variable collector-base capacitance'1986 4,583,064'Strip-line resonator'1986 4,553,264'Double superheterodyne tuner'1985 4,536,724'Voltage-controlled oscillator having three or more varactor diodes'1985 4,506,241'Coaxial dielectric resonator having different impedance portions and method of manufacturing the same'1985 4,449,108'Band-stop filter for VHF-UHF band'1984 4,437,076'Coaxial filter having a plurality of resonators each having a bottomed cylinder'1984 4,423,396'Bandpass filter for UHF band'1983 4,419,768'Wideband tuner for VHF, CATV and UHF television signals'1983 4,412,351'Microwave mixing circuit'1983 4,389,624'Dielectric-loaded coaxial resonator with a metal plate for wide frequency adjustments'1983 4,382,238'Band stop filter and circuit arrangement for common antenna'1983 4,371,853'Strip-line resonator and a band pass filter having the same'1983 4,361,820'Hybrid microwave circuit'1982 4,340,975'Microwave mixing circuit and a VHF-UHF tuner having the mixing circuit'1982 4,315,333'Circuit arrangement for a wide-band VHF-UHF television double superheterodyne receiver'1982 4,292,610'Temperature compensated coaxial resonator having inner, outer and intermediate conductors'1981 4,268,809'Microwave filter having means for capacitive interstage coupling between transmission lines'1981 4,254,390'Compact electronic tuning device'1981 4,224,587'Comb-line bandpass filter'1980 4,214,218'Impedance matched tuning device having image trapping circuit'1980 4,214,217'Electronic tuning circuit having image trapping element'1980 4,121,182'Electrical tuning circuit'1978 4,059,815'Coaxial cavity resonator'1977 4,016,568'Method and system for measuring doppler frequency shift of an echo'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1988Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (33)· patent assignee history

1977–1983Based in Kawasaki, JP· patent location history

1982–1988Based in Sagamihara, JP· patent location history

1988Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD	33	1977–1988

Locations

Location	Patents	Span
Sagamihara, JP	21	1982–1988
Kawasaki, JP	11	1977–1983
Kanagawa, JP	1	1988