Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6749940 | Moistureproof multilayered film | Masamichi Akatsu, Hisaaki Terashima, Yasuhiro Tada | 2004-06-15 |
| 5042924 | Optical phase plate and production process thereof | Mitsuru Ohta, Akiyasu Ishii, Yuji Kojima, Akira Tanaka | 1991-08-27 |