Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5344683 | Optical information recording medium with phase grooves in land portions of information recording areas | — | 1994-09-06 |
AS
Akihiko Shimizu
Overall (1994): #159,673 of 165,921Top 100%
1
Patents 1994