Inventor
AMADA NOBUTAKA
JP52 patents
⚠️ This page may combine multiple inventors who share the name “AMADA NOBUTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
45 patentsUS5912969AJun 15, 1999
Information receiving and recording/reproducing apparatus/method having function for limiting/delimiting for protecting copyright of recording information
HITACHI LTD95 citations98
US5878188AMar 2, 1999
Apparatus for recording and reproducing temporally compressed digital information signal
HITACHI LTD32 citations96
US5825969AOct 20, 1998
Information management apparatus for inhibiting reproduction in a video cassette recorder
HITACHI LTD30 citations96
US5719943AFeb 17, 1998
Digital information signal transmitting/receiving method and system
HITACHI LTD70 citations96
US5699370ADec 16, 1997
Information recording and reproduction apparatus to be controlled by temporal information
HITACHI LTD49 citations96
US4541091ASep 10, 1985
Code error detection and correction method and apparatus
HITACHI LTD64 citations96
US4409559AOct 11, 1983
Supply voltage controlled stereophonic amplifier system
HITACHI LTD68 citations96
US6292618B1Sep 18, 2001
Image recording and reproducing apparatus
HITACHI LTD42 citations95
US5875279AFeb 23, 1999
Subscriber terminal of an interactive communication system and control device thereof
HITACHI LTD29 citations93
US5706385AJan 6, 1998
Rotary head type magnetic recording and reproducing apparatus
HITACHI LTD30 citations93
US5465180ANov 7, 1995
Method of and apparatus for recording and/or reproducing a current digital video signal and a high-definition digital video signal in a common track format
HITACHI LTD25 citations93
US6363210B1Mar 26, 2002
Communication system for encrypted data and apparatus for selectively recording and reproducing received analog signal and received digital signal
HITACHI LTD25 citations92
US6339676B1Jan 15, 2002
Video signal recording and reproducing apparatus compatible with analog and digital video signal recording and reproducing
HITACHI LTD20 citations92
US5903704AMay 11, 1999
Apparatus for selectively recording and reproducing received analog and digital signals
HITACHI LTD26 citations92
US5260671ANov 9, 1993
Receiving circuit for demodulating an angle modulated signal
HITACHI LTD32 citations92
US4642573AFeb 10, 1987
Phase locked loop circuit for demodulating suppressed carrier signals
HITACHI LTD36 citations92
US5414567AMay 9, 1995
Magnetic recording and reproducing device
HITACHI LTD21 citations89
US6249639B1Jun 19, 2001
Digital information recording-reproducing apparatus
HITACHI LTD11 citations82
US4427951AJan 24, 1984
Protective device for power amplifier
HITACHI LTD22 citations82
US4758903AJul 19, 1988
Apparatus for recording and reproducing video signal and digital signal other than video signal
HITACHI LTD22 citations81
US7197232B2Mar 27, 2007
Digital information recording-reproducing apparatus
HITACHI LTD8 citations74
US6807364B2Oct 19, 2004
Digital information recording-reproducing apparatus
HITACHI LTD4 citations74
US6388831B1May 14, 2002
Apparatus and method for limiting the reproduction of main information
HITACHI LTD3 citations74
US6219320B1Apr 17, 2001
Recording and reproducing system and equalizing method for use in it.
HITACHI LTD5 citations74
US6204985B1Mar 20, 2001
Information management apparatus
HITACHI LTD6 citations74
US6104862AAug 15, 2000
Video signal recording and reproducing apparatus compatible with analog and digital video signal recording and reproducing
HITACHI LTD13 citations74
US6031677AFeb 29, 2000
Information management apparatus
HITACHI LTD3 citations74
US5930274AJul 27, 1999
Information recording and reproduction apparatus to be controlled by temporal information
HITACHI LTD6 citations74
US5341248AAug 23, 1994
Magnetic recording/reproducing apparatus having head structure for selectively recording/reproducing either of two kinds of signals containing different amounts of information
HITACHI LTD17 citations74
US4937686AJun 26, 1990
Method 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 scanner
HITACHI LTD17 citations74
US4345215AAug 17, 1982
Audio frequency power amplifier circuit
HITACHI LTD7 citations74
US6763174B2Jul 13, 2004
Image recording and reproducing apparatus
HITACHI LTD6 citations73
US4100501AJul 11, 1978
Audio frequency power amplifier
HITACHI LTD8 citations73
US4068187AJan 10, 1978
Audio-frequency power amplifiers
HITACHI LTD7 citations73
US6731451B2May 4, 2004
Information management apparatus
HITACHI LTD1 citations63
US6430362B1Aug 6, 2002
Digital video signal recording/reproducing method and apparatus
HITACHI LTD4 citations63
US6349012B1Feb 19, 2002
Magnetic recording and/or reproducing apparatus
HITACHI LTD4 citations63
US5602816AFeb 11, 1997
Recording and reproducing system and equalizing method for use in it
HITACHI LTD1 citations63
US6195499B1Feb 27, 2001
Magnetic recording and/or reproducing apparatus
HITACHI LTD3 citations62
US6085023AJul 4, 2000
Magnetic recording and reproducing control apparatus
HITACHI LTD4 citations62
US6429985B2Aug 6, 2002
Digital information recording apparatus and digital information recording and reproducing apparatus
HITACHI LTD0 citations52
US5777966AJul 7, 1998
Recording and reproducing system and equalizing method for use in it
HITACHI LTD0 citations52
US5751506AMay 12, 1998
Digital information reproducing apparatus using partial response detection method including quadruple processing
HITACHI LTD1 citations52
US5650989AJul 22, 1997
Reproducing system and equalizing method for use in it
HITACHI LTD0 citations52
US7450815B2Nov 11, 2008
Image recording and reproducing apparatus
HITACHI LTD0 citations51
MAXELL LTD
2 patentsAMADA NOBUTAKA
2 patentsFIPA FROHWITTER IP AG
1 patentShowing the top 50 of 52 patents by PatentIndex Score.