Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4646064 | Volume control device for ringer | Jerry D. Palmer, Robert J. Janus | 1987-02-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4646064 | Volume control device for ringer | Jerry D. Palmer, Robert J. Janus | 1987-02-24 |