Issued Patents 2004
Showing 1–3 of 3 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 |