Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4316197 | Easily removable instrument pen tip | James R. Hubbard | 1982-02-16 |
| 4207581 | Recording instrument marker mounting assembly and precision adjustment control knob therefor | Joseph Pelensky | 1980-06-10 |