RN

Ryoji Nakahama

SI Sanshin Industries: 25 patents #10 of 319Top 4%
Yamaha Motor: 4 patents #461 of 2,310Top 20%
MM Mitsubishi Motors: 2 patents #508 of 1,823Top 30%
SC Sanshin Industries Co.: 1 patents #5 of 32Top 20%
SK Shansin Kogyo Kabushiki Kaisha: 1 patents #1 of 12Top 9%
YC Yamaha Motor Co.: 1 patents #6 of 83Top 8%
📍 Iwata, JP: #27 of 782 inventorsTop 4%
Overall (All Time): #132,977 of 4,157,543Top 4%
29
Patents All Time

Issued Patents All Time

Showing 1–25 of 29 patents

Patent #TitleCo-InventorsDate
6126231 Impact energy absorbing structure for vehicle cabin Naoyuki Suzuki, Katsutoshi Ishikawa, Hajime Tsuchihara, Ryosuke Yamamoto, Ikumasa Moriyasu 2000-10-03
6050631 Impact energy absorbing structure for vehicle cabin Naoyuki Suzuki, Katsutoshi Ishikawa, Hajime Tsuchihara, Ryosuke Yamamoto, Ikumasa Moriyasu 2000-04-18
5759073 Dual propeller system for marine drive Yoshitsugu Sumino 1998-06-02
5352137 Automatic position controller for marine propulsions Tomio Iwai 1994-10-04
5207170 Marine propulsion unit control system 1993-05-04
5184967 Thrust flange lubricating structure of marine propulsion unit Akihiro Onoue 1993-02-09
4931027 Tilting device for outboard engine Toshiyuki Yamazaki 1990-06-05
4909226 Device driving injection pump for fuel-injection engine 1990-03-20
4850911 Power transmission device for inboard/outboard system Naoyoshi Kuragaki 1989-07-25
4811717 Device driving injection pump for fuel-injection engine 1989-03-14
4795001 Two-cycle fuel-injection engine Tatsuki Uchida 1989-01-03
4784625 Tilt lock mechanism for marine propulsion device 1988-11-15
4781631 Supporting device for marine propulsion apparatus Tatsuki Uchida 1988-11-01
4767365 Shifting device for inboard-outboard drive Naoyoshi Kuragaki 1988-08-30
4734065 System for stable running of marine propulsions Katsuji Hirade, Takashi Koike 1988-03-29
4726799 Outboard motor Norimichi Harada, Naoyoshi Kuragaki 1988-02-23
4682961 Tilt device for boat propulsion machine 1987-07-28
4673358 Mounting arrangement for outboard drive Tomio Iwai 1987-06-16
4631035 Hydraulic tilt device for marine propulsion unit 1986-12-23
4615683 Outboard motor Norimichi Harada, Naoyoshi Kuragaki 1986-10-07
4575342 Tilt lock mechanism for marine propulsion device Takashi Iwashita 1986-03-11
4570776 Detent mechanism for clutches Takashi Iwashita, Hideo Suzuki 1986-02-18
4559018 Outboard motor Norimichi Harada, Seiji Wada, Yoshio Hosono, Tetsuya Tomoda, Susumu Yukishima 1985-12-17
4557696 Tilt mechanism for marine propulsion device 1985-12-10
4551104 Tilt lock mechanism for marine propulsion device Takashi Iwashita, Shinya Atsumi 1985-11-05