Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4753658 | Erasable ink: sulphonated rubber dyed with basic dye and dissolved in organic solvent | Shuichi Okuzono, Tatsushi Nakagawa | 1988-06-28 |
| 4740549 | Ink composition for writing board | Shuichi Okuzono, Yasuhiro Sakanaka | 1988-04-26 |
| 4713083 | Alcoholic solution of sulphonic acid-containing copolymer dyed with basic dye | Shuichi Okuzono, Tetsuo Tanaka, Yasuhiro Oda, Noriaki Emura | 1987-12-15 |
| 4623689 | Aqueous colored polymer, process for preparing same and ink comprising same | Noriaki Emura, Tetsuo Tanaka, Yasuhiro Oda | 1986-11-18 |
| 4612343 | Colored polymer emulsion and process for preparation thereof | Shuichi Okuzono, Yasuhiro Oda, Noriaki Emura | 1986-09-16 |
| 4533525 | Method for inhibiting corrosion of metal | Hiroshi Minamide, Hiroshi Murayama | 1985-08-06 |