Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6765070 | Copolymerized polyester resin composition and stretched film | Koichi Tamura, Fumio Keitoku, Yasuhiro Tomita | 2004-07-20 |
| 6239249 | Method for producing a copolymerized polyester resin | Fumio Keitoku, Hisashi Kimura, Koichi Ikeyama | 2001-05-29 |