Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5686725 | Method for reading of invisible marking | Tsutomu Maruyama, Atsushi Akiyama, Hiroyasu Matsuki, Kazuo Sanada, Masanobu Hidaka | 1997-11-11 |
| 5547501 | Method for formation of invisible marking and method for reading of invisible marking | Tsutomu Maruyama, Atsushi Akiyama, Kazuo Sanada, Masanobu Hidaka | 1996-08-20 |
| 4896941 | Image-transmitting fiber | Shotaro Hayashi, Tsugio Sonobe, Kiyonori Ishii, Kazuo Sanada, Takashi Tsumanuma +1 more | 1990-01-30 |
| 4770493 | Heat and radiation resistant optical fiber | Kuniaki Ara, Hiroshi Rindo, Koichiro Nakamoto, Takashi Tsumanuma, Kazuo Sanada +1 more | 1988-09-13 |
| 4707075 | Very-low-temperature fiberscope | Eiji Fukushima, Minoru Tanaka, Kazuo Sanada | 1987-11-17 |