Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4683480 | X-Y plotter drive roller arrangement | Masami Sakamoto, Tamio Ishihara | 1987-07-28 |
| 4577409 | Pen changing apparatus for plotter | Masami Sakamoto, Tamio Ishihara | 1986-03-25 |