Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5368962 | Masking film | Naohiko Kiryu, Hiroshi Maruyama, Yoshinori Watanabe | 1994-11-29 |
| 5043198 | Lightsafe masking film | Hiroshi Maruyama, Naohiko Kiryu | 1991-08-27 |
| 5009944 | Lightsafe masking film | Hiroshi Maruyama, Naohiko Kiryu, Susumu Tagashira, Hisashi Shimokawahara | 1991-04-23 |
| 4925713 | Lightsafe masking film | Naohiko Kiryu, Kazutoshi Kimizuka, Hiroshi Maruyama | 1990-05-15 |
| 4923727 | Lightsafe masking film | Hiroshi Maruyama, Naohiko Kiryu | 1990-05-08 |