Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4910787 | Discriminator between handwritten and machine-printed characters | Tetsuo Umeda | 1990-03-20 |
| 4831658 | Binary signal producing apparatus for optical character recognition | Tetsuo Umeda, Kazumi Nakano | 1989-05-16 |
| 4747149 | Optical character recognition apparatus | Tetsuo Umeda | 1988-05-24 |
| 4733226 | Overlapped-transfer detecting apparatus for mail article | Yoshihiro Matsuda, Tetsuo Umeda | 1988-03-22 |