Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4231577 | Electrical game apparatus using fold switch matrices | Holly T. Doyle, Robert O. Doyle | 1980-11-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4231577 | Electrical game apparatus using fold switch matrices | Holly T. Doyle, Robert O. Doyle | 1980-11-04 |