Inventor · disambiguated record
Yasufumi Yumde
Also filed as: FURUHATA TAKASHI · YUMDE YASUFUMI
11 granted patents·220 citations·filing 1973–1989
91Inventor score
Top patents by PatentIndex Score
11 records- 0193US4210927AMethod for transmitting a color video signal on a narrow-band transmission lineHITACHI LTD·Filed 1978·Granted Jul 1, 1980·84 cites·14 claims
- 0278US4292652AMethod of receiving a video signalHITACHI LTD·Filed 1978·Granted Sep 29, 1981·23 cites·17 claims
- 0377US4843493ARotary head type magnetic recording and reproducing apparatus and method of producing tracking control signals thereforHITACHI LTD·Filed 1986·Granted Jun 27, 1989·24 cites·25 claims
- 0476US4670796ARotary head type PCM recorderHITACHI LTD·Filed 1984·Granted Jun 2, 1987·18 cites·7 claims
- 0573US3947870AReceiving system for auxiliary information signal transmitted during the vertical blanking period of a television signalHITACHI LTD·Filed 1974·Granted Mar 30, 1976·15 cites·7 claims
- 0671US4937686AMethod and apparatus for PCM recording and reproducing an audio signal having an asynchronous relation between the sampling frequency for the audio signal and the rotation frequency of a rotary head scannerHITACHI LTD·Filed 1986·Granted Jun 26, 1990·17 cites·12 claims
- 0768US3941921ASystem for converting frequency band of picture signalHITACHI LTD·Filed 1973·Granted Mar 2, 1976·12 cites·10 claims
- 0859US4743977AVTR having magnetic-head array capable of recording/reproducing signals of a plurality of recording systemsHITACHI LTD·Filed 1986·Granted May 10, 1988·18 cites·10 claims
- 0943US4081834ASystem for compensating jitter of video signalHITACHI LTD·Filed 1976·Granted Mar 28, 1978·6 cites·4 claims
- 1031US4004082AMethod and system for multiplexing signal for transmissionHITACHI LTD·Filed 1974·Granted Jan 18, 1977·1 cites·13 claims
- 1126US5189564AMagnetic recording/reproducing method and apparatusAMADA NOBUTAKA·Filed 1989·Granted Feb 23, 1993·2 cites·31 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →