Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6638573 | Spectacles frame surface treatment method | Masami Nakamoto | 2003-10-28 |
| 6533418 | System for making spectacles to order | Yukihiro Izumitani, Isao Iizuka, Yasushi Sakai, Shigeru Watanabe | 2003-03-18 |