Inventor · disambiguated record
Nobutaka Amada
Also filed as: AMADA NOBUTAKA
52 granted patents·3 pending applications·879 citations·filing 1977–2023
98Inventor score
Top patents by PatentIndex Score
55 records- 0196US4541091ACode error detection and correction method and apparatusHITACHI LTD·Filed 1983·Granted Sep 10, 1985·64 cites·13 claims
- 0296US4409559ASupply voltage controlled stereophonic amplifier systemHITACHI LTD·Filed 1981·Granted Oct 11, 1983·68 cites·8 claims
- 0394US5912969AInformation receiving and recording/reproducing apparatus/method having function for limiting/delimiting for protecting copyright of recording informationHITACHI LTD·Filed 1997·Granted Jun 15, 1999·95 cites·15 claims
- 0489US5878188AApparatus for recording and reproducing temporally compressed digital information signalHITACHI LTD·Filed 1994·Granted Mar 2, 1999·32 cites·11 claims
- 0588US5699370AInformation recording and reproduction apparatus to be controlled by temporal informationHITACHI LTD·Filed 1995·Granted Dec 16, 1997·49 cites·15 claims
- 0685US5825969AInformation management apparatus for inhibiting reproduction in a video cassette recorderHITACHI LTD·Filed 1997·Granted Oct 20, 1998·30 cites·17 claims
- 0784US6339676B1Video signal recording and reproducing apparatus compatible with analog and digital video signal recording and reproducingHITACHI LTD·Filed 2000·Granted Jan 15, 2002·20 cites·9 claims
- 0882US4427951AProtective device for power amplifierHITACHI LTD·Filed 1981·Granted Jan 24, 1984·22 cites·11 claims
- 0981US5719943ADigital information signal transmitting/receiving method and systemHITACHI LTD·Filed 1995·Granted Feb 17, 1998·70 cites·27 claims
- 1079US7197232B2Digital information recording-reproducing apparatusHITACHI LTD·Filed 2004·Granted Mar 27, 2007·8 cites·8 claims
- 1177US5903704AApparatus for selectively recording and reproducing received analog and digital signalsHITACHI LTD·Filed 1995·Granted May 11, 1999·26 cites·13 claims
- 1276US12165604B2Head-up display apparatusMAXELL LTD·Filed 2023·Granted Dec 10, 2024·0 cites·7 claims
- 1376US6292618B1Image recording and reproducing apparatusHITACHI LTD·Filed 1998·Granted Sep 18, 2001·42 cites·31 claims
- 1475US6204985B1Information management apparatusHITACHI LTD·Filed 2000·Granted Mar 20, 2001·6 cites·8 claims
- 1571US4937686AMethod 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
- 1670US5706385ARotary head type magnetic recording and reproducing apparatusHITACHI LTD·Filed 1994·Granted Jan 6, 1998·30 cites·32 claims
- 1769US4642573APhase locked loop circuit for demodulating suppressed carrier signalsHITACHI LTD·Filed 1985·Granted Feb 10, 1987·36 cites·6 claims
- 1867US6763174B2Image recording and reproducing apparatusHITACHI LTD·Filed 2001·Granted Jul 13, 2004·6 cites·12 claims
- 1967US5341248AMagnetic recording/reproducing apparatus having head structure for selectively recording/reproducing either of two kinds of signals containing different amounts of informationHITACHI LTD·Filed 1993·Granted Aug 23, 1994·17 cites·16 claims
- 2067US4758903AApparatus for recording and reproducing video signal and digital signal other than video signalHITACHI LTD·Filed 1985·Granted Jul 19, 1988·22 cites·12 claims
- 2166US6807364B2Digital information recording-reproducing apparatusHITACHI LTD·Filed 2001·Granted Oct 19, 2004·4 cites·73 claims
- 2266US5465180AMethod of and apparatus for recording and/or reproducing a current digital video signal and a high-definition digital video signal in a common track formatHITACHI LTD·Filed 1993·Granted Nov 7, 1995·25 cites·14 claims
- 2365US11847980B2Head-up display apparatusMAXELL LTD·Filed 2021·Granted Dec 19, 2023·0 cites·7 claims
- 2465US6363210B1Communication system for encrypted data and apparatus for selectively recording and reproducing received analog signal and received digital signalHITACHI LTD·Filed 1999·Granted Mar 26, 2002·25 cites·11 claims
- 2564US6388831B1Apparatus and method for limiting the reproduction of main informationHITACHI LTD·Filed 2000·Granted May 14, 2002·3 cites·14 claims
- 2664US6249639B1Digital information recording-reproducing apparatusHITACHI LTD·Filed 1999·Granted Jun 19, 2001·11 cites·4 claims
- 2764US5875279ASubscriber terminal of an interactive communication system and control device thereofHITACHI LTD·Filed 1997·Granted Feb 23, 1999·29 cites·1 claims
- 2859US5414567AMagnetic recording and reproducing deviceHITACHI LTD·Filed 1990·Granted May 9, 1995·21 cites·37 claims
- 2958US8472785B2Digital information recording-reproducing apparatusAMADA NOBUTAKA·Filed 2007·Granted Jun 25, 2013·0 cites·4 claims
- 3057US5260671AReceiving circuit for demodulating an angle modulated signalHITACHI LTD·Filed 1992·Granted Nov 9, 1993·32 cites·26 claims
- 3156US6731451B2Information management apparatusHITACHI LTD·Filed 2001·Granted May 4, 2004·1 cites·6 claims
- 3255US4100501AAudio frequency power amplifierHITACHI LTD·Filed 1977·Granted Jul 11, 1978·8 cites·8 claims
- 3353US2007122122A1Digital video signal recording/reproducing method and apparatusOKAMOTO HIROO·Filed 2006·Application pending·0 cites
- 3452US6104862AVideo signal recording and reproducing apparatus compatible with analog and digital video signal recording and reproducingHITACHI LTD·Filed 1995·Granted Aug 15, 2000·13 cites·41 claims
- 3551US4068187AAudio-frequency power amplifiersHITACHI LTD·Filed 1977·Granted Jan 10, 1978·7 cites·8 claims
- 3650US4345215AAudio frequency power amplifier circuitHITACHI LTD·Filed 1980·Granted Aug 17, 1982·7 cites·3 claims
- 3749US7450815B2Image recording and reproducing apparatusHITACHI LTD·Filed 2004·Granted Nov 11, 2008·0 cites·17 claims
- 3848US6219320B1Recording and reproducing system and equalizing method for use in it.HITACHI LTD·Filed 1998·Granted Apr 17, 2001·5 cites·6 claims
- 3948US2002154902A1Digital video signal recording/reproducing method and apparatusFiled 2002·Application pending·0 cites
- 4047US7706541B2Information management apparatusFIPA FROHWITTER IP AG·Filed 2004·Granted Apr 27, 2010·0 cites·4 claims
- 4146US5930274AInformation recording and reproduction apparatus to be controlled by temporal informationHITACHI LTD·Filed 1997·Granted Jul 27, 1999·6 cites·18 claims
- 4244US6429985B2Digital information recording apparatus and digital information recording and reproducing apparatusHITACHI LTD·Filed 2001·Granted Aug 6, 2002·0 cites·8 claims
- 4344US2002102096A1Video signal recording apparatus and video signal recording and reproducing apparatusHITACHI LTD·Filed 2001·Application pending·0 cites
- 4443US6031677AInformation management apparatusHITACHI LTD·Filed 1998·Granted Feb 29, 2000·3 cites·5 claims
- 4540US6349012B1Magnetic recording and/or reproducing apparatusHITACHI LTD·Filed 1999·Granted Feb 19, 2002·4 cites·22 claims
- 4639US6430362B1Digital video signal recording/reproducing method and apparatusHITACHI LTD·Filed 1998·Granted Aug 6, 2002·4 cites·26 claims
- 4736US6195499B1Magnetic recording and/or reproducing apparatusHITACHI LTD·Filed 1999·Granted Feb 27, 2001·3 cites·26 claims
- 4835US5602816ARecording and reproducing system and equalizing method for use in itHITACHI LTD·Filed 1995·Granted Feb 11, 1997·1 cites·12 claims
- 4934US9786313B2Optical-information recording/reproducing apparatus and optical-information recording/reproducing methodHITACHI-LG DATA STORAGE INC·Filed 2016·Granted Oct 10, 2017·0 cites·18 claims
- 5034US6085023AMagnetic recording and reproducing control apparatusHITACHI LTD·Filed 1997·Granted Jul 4, 2000·4 cites·24 claims
Showing the top 50 of 55 patent records by PatentIndex Score.
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