Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876133 | Optical data recording system and method of production of recording medium | Toshinori Sugiyama, Tetsurou Ikegaki, Mitsuru Shimizu | 1989-10-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876133 | Optical data recording system and method of production of recording medium | Toshinori Sugiyama, Tetsurou Ikegaki, Mitsuru Shimizu | 1989-10-24 |