Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5291027 | Optical identification multiple diffraction grating mark member and card using the same | Akihiko Kobayashi, Susumu Takahashi, Toshiki Toda | 1994-03-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5291027 | Optical identification multiple diffraction grating mark member and card using the same | Akihiko Kobayashi, Susumu Takahashi, Toshiki Toda | 1994-03-01 |