Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5036575 | Method and apparatus for conversion of doorknob lock sets | Neil P. Campion, Richard P. Novak | 1991-08-06 |
| 4876783 | Method and apparatus for conversion of doorknob lock sets | Neil P. Campion, Richard P. Novak | 1989-10-31 |