Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6185264 | Apparatus and method for frequency shift keying | — | 2001-02-06 |
| 5573099 | Apparatus and method for identifying metallic tokens and coins | Donald Wesley Church | 1996-11-12 |