JH

Jun Hirai

SO Sony: 47 patents #529 of 25,231Top 3%
Rohm Co.: 6 patents #487 of 2,292Top 25%
PA Panasonic: 4 patents #6,180 of 21,108Top 30%
MM Mitsubishi Mining: 3 patents #285 of 2,247Top 15%
ME Mitsubishi Hitachi Tool Engineering: 2 patents #10 of 42Top 25%
KT Kabushiki Kaisha Toshiba: 2 patents #9,982 of 21,451Top 50%
Sumitomo Electric Industries: 1 patents #13,249 of 21,551Top 65%
HI Hitachi: 1 patents #17,742 of 28,497Top 65%
TL Tokyo Electron Limited: 1 patents #3,538 of 5,567Top 65%
TK Tsudakoma Kogyo: 1 patents #49 of 130Top 40%
Overall (All Time): #31,143 of 4,157,543Top 1%
68
Patents All Time

Issued Patents All Time

Showing 51–68 of 68 patents

Patent #TitleCo-InventorsDate
6222978 Video signal copy guard apparatus and method 2001-04-24
6115341 Digital signal recording method and apparatus and digital signal reproduction method and apparatus 2000-09-05
5915676 Lever-type frictional resistance force variable system Hisanori Abiru, Hideaki Harada, Kenji Imada, Souhei Tateyama 1999-06-29
5914754 Video signal aspect ratio conversion apparatus Teruhiko Kori, Tadashi Ezaki 1999-06-22
5815530 Data converters for sound equipment 1998-09-29
5541999 Audio apparatus having a karaoke function 1996-07-30
5444785 Echo attaching circuit and audio device using the same Kaoru Izawa, Shigeyoshi Hayashi 1995-08-22
5394474 Echo attaching circuit and audio device using the same Kaoru Izawa 1995-02-28
5332916 Transmission gate 1994-07-26
5300892 Audio signal amplifier circuit 1994-04-05
5272847 Long period pendulum damping equipment Hisanori Abiru, Hideaki Harada, Kazumi Tamura, Manabu Fujishiro, Yasuo Ogi 1993-12-28
5223945 Recording mode discrimination circuit Takashi Honda 1993-06-29
5223944 Method and apparatus for transmitting video signals during first and second portions thereof Satoshi Shimada 1993-06-29
5168967 Dynamic damper and method for detecting malfunction of dynamic damper Hisanori Abiru, Hideaki Harada, Kazumi Tamura, Manabu Fujishiro 1992-12-08
5040082 Recording apparatus Shuuji Moro, Masahiro Kiko 1991-08-13
4513311 Video signal processing unit Masayasu Kaneko 1985-04-23
4291330 Video signal processing circuit for eliminating an interfering signal 1981-09-22
4290082 Noise and cross-talk elimination in recording and reproducing video signals 1981-09-15