Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4678353 | Tape supply cartridge | Michael M. Richardson | 1987-07-07 |
| 4624590 | Lettering apparatus | Michael M. Richardson, Ronald Tuckner | 1986-11-25 |
| 4557617 | Tape supply cartridge | Michael M. Richardson | 1985-12-10 |