Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6817724 | Triangular pyramidal cube corner retroreflection element | Yutaka Hamada, Takashi Yoshioka, Akihiro Matsuda | 2004-11-16 |
| 6802616 | Triangular pyramid type cube-corner retroreflective element | — | 2004-10-12 |
| 6685323 | Triangular-pyramidal cube-corner retroreflective sheeting | Keiji Adachi | 2004-02-03 |
| 6568817 | Retroreflecting sheet having printed layer | Akihiro Matsuda | 2003-05-27 |
| 6390629 | Triangular-pyramidal cube-corner retroreflection sheet | Keiji Adachi | 2002-05-21 |
| 6318866 | Triangular-pyramidal cube-corner retro-reflective sheeting | Yutaka Hamada, Takehito Takahashi | 2001-11-20 |
| 6120280 | Microprism master mold | Keiji Adachi | 2000-09-19 |
| 6083607 | Triangular pyramidal cube corner type retroreflective sheet | Keiji Adachi | 2000-07-04 |
| 6010609 | Method of making a microprism master mold | Keiji Adachi | 2000-01-04 |
| 5945042 | Method for continuously forming an array of optical elements and apparatus therefor | Keiji Adachi | 1999-08-31 |