Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7773847 | Multimode optical fiber | Kazuaki Negishi, Yasushi Koyano, Itaru Sakabe, Masashi Onishi, Tetsuya Nakanishi | 2010-08-10 |
| 7164829 | Optical fiber, optical transmission line and optical communications system | Masao Tsukitani, Takatoshi Kato | 2007-01-16 |
| 6449986 | Method of production of porous glass base material for optical fiber with cleaning of the burner with gas at 25 m/s or faster | Takashi Sugiyama, Nobuyuki Hirano, Naoyuki Fukushima, Takao Kabaya | 2002-09-17 |
| 4844377 | Tape cassette | Yoshinori Shiomi, Toshibumi Kamiyama, Akihiro Nishimura, Masao Kawagishi, Hideki Sakumoto | 1989-07-04 |
| 4811121 | Magnetic recording and reproducing system using preceding and lagging groups of rotary heads to permit coincident timing for reproduced video and audio signals | Kunio Sekimoto | 1989-03-07 |
| 4809113 | Tape cassette with improved cover structure | Akihiro Nishimura, Masao Kawagishi, Hideki Sakumoto, Yoshinori Shiomi | 1989-02-28 |
| 4803575 | Tape cassettes having bottom grooves for use in tape recorder having bottom projection in cassette holder | Akihiro Nishimura, Masao Kawagishi, Hideki Sakumoto, Yoshinori Shiomi | 1989-02-07 |