Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870444 | Copying apparatus | Takemi Yamamoto, Ryohei Komiya, Yumio Matsumoto, Fumihiro Sunda | 1989-09-26 |
| 4826751 | Transfer-type photo-sensitive sheet | — | 1989-05-02 |
| 4816873 | Imaging device | — | 1989-03-28 |
| 4810614 | Method of recording information on photosensitive and pressure-sensitive sheet utilizing mask original form | Kazuo Sangyoji, Takemi Yamamoto, Tsugio Okamoto, Yuji Asano, Kenji Sakakibara +4 more | 1989-03-07 |
| 4806446 | Photosensitive recording medium capable of image contrast adjustment | Satoshi Furukawa | 1989-02-21 |
| 4797107 | Copyable blackboard | Hideo Yoshihara, Takeshi Izaki, Akihiro Sawada, Takemi Yamamoto, Kazuo Sangyoji | 1989-01-10 |