Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874530 | Method for treating photographic processing waste solution | Masayuki Kurematsu, Shigeharu Koboshi, Nobutaka Goto, Naoki Takabayashi | 1989-10-17 |
| 4838673 | Polarized lens and method of making the same | Charles E. Richards | 1989-06-13 |
| 4837139 | Method for processing a light-sensitive silver halide color photographic material using at least one silver halide emulsion layer and at least one of a cyan coupler and magneta coupler | Shigeharu Koboshi, Satoru Kuse, Masao Ishikawa | 1989-06-06 |