Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874664 | Birefringent plate and manufacturing method for the same | Shigeki Hamaguchi, Yasuhiro Ohtsuka, Yasunori Taga, Masahiko Ishii | 1989-10-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874664 | Birefringent plate and manufacturing method for the same | Shigeki Hamaguchi, Yasuhiro Ohtsuka, Yasunori Taga, Masahiko Ishii | 1989-10-17 |