Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6372871 | Dithiocarbonate composition | Shinichiro Jimbo, Ikuo Shimizu, Iwao Hotta, Masanori Ikuta, Izumi Itani | 2002-04-16 |
| 6331653 | Process for producing 3,4-dihydroxy-3-cyclobutene-1,2-dione | Ikuo Shimizu, Hiroshi Toyoda, Asako Tanaka | 2001-12-18 |
| 6160044 | Compositions containing dithiocarbonate compound | Shinichiro Jimbo, Ikuo Shimizu, Iwao Hotta, Masanori Ikuta, Izumi Itani | 2000-12-12 |
| 5922246 | Eyeglass lens and molded material of synthetic resin having transmittance minimum no greater than 25% at 550-585 nm | Ikuo Shimizu, Kazuko Mabuchi, Yoshihisa Ishiba, Oritoshi Murata | 1999-07-13 |
| 5808166 | Method for producing 3,4-dihydroxy-3-cyclobutene-1,2-dione | Ikuo Shimizu, Takeshi Usami, Hiroshi Toyoda, Asako Okajima | 1998-09-15 |
| 5681685 | Photopolymerizable composition containing squarylium compound | Tsuguo Yamaoka, Kenichi Koseki, Ikuo Shimizu, Hiroshi Toyoda, Hirotaka Kinoshita | 1997-10-28 |