Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6932677 | Polishing pad, method of manufacturing glass substrate for use in data recording medium using the pad, and glass substrate for use in data recording medium obtained by using the method | Hirokazu Tajima | 2005-08-23 |
| 6749487 | Method of polishing glass substrate for information recording media, and glass substrate for information recording media | Koji Okuhata, Yoichiro Shimizu | 2004-06-15 |
| 5843489 | Screw for an extruder | — | 1998-12-01 |
| 5817346 | Sheet width adjusting apparatus for rolling head extruder | — | 1998-10-06 |
| 5607703 | Roller head extruder unit | Kenji Sakai, Yoshihiro Hamada, Katsunobu Hagiwara, Toshio Ujihara, Toshio Yanagihara | 1997-03-04 |
| 5415473 | Cone type twin screw extruder having gear reduction system | Toshio Uzihara, Toshio Yanagihara, Masahiro Kanemitsu | 1995-05-16 |
| 5157097 | Polyamide-imide resins and production thereof | Hiroshi Takayanagi, Hirotoshi Katsuoka, Masumi Ookita, Akihiro Yamaguchi, Masahiko Asano | 1992-10-20 |
| 4795795 | Catalytic preparation of polyamide or polyamide-polymide with N,N'-dimethyl alkylene urea solvent | Masahiro Kouno, Kazumi Mizutani, Masanori Osawa, Kohei Shizuka, Toshihiro Toyoda | 1989-01-03 |
| 4785069 | Preparation process of heat-resistant polymers from polycarboxylic acids or anhydrides in the presence of an alkali metal fluoride and quaternary onium salt | Masahiro Kouno, Akihiro Yamaguchi, Masanori Osawa, Kohei Shizuka, Kazumi Mizutani | 1988-11-15 |
| 4736008 | Preparation process of heat-resistant polymers from polycarboxcylic acids and anhydrides in the presence of an alkali metal fluoride | Masahiro Kouno, Akihiro Yamaguchi, Masanori Osawa, Kohei Shizuka, Kazumi Mizutani | 1988-04-05 |