Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4479432 | Thick film printing method | Tatsuo Masaki, deceased, Toyoshi Nishimoto | 1984-10-30 |
| 4448493 | Electrochromic display device | Nagahisa Matsudaira, Kaneki Yoshida, Kenzo Fukuyoshi | 1984-05-15 |
| 4325981 | Method of preventing color accurate reproductions using color photocopiers and the like | Takeo Sugiura, Keiji Miyajima, Hideo Nagatomo | 1982-04-20 |
| 4277514 | Forgery resistant document with colored areas and method for thwarting reproduction of same | Takeo Sugiura, Keiji Miyajima, Hideo Nagatomo | 1981-07-07 |