Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5944311 | Sequential attitude-responsive enclosure puzzle | — | 1999-08-31 |
| 5467510 | Sock tagging device and method | — | 1995-11-21 |
| 5294229 | Teacher and parent interactive communication system incorporating pocket sized portable audio numeric terminals | Darrell R. Tunning | 1994-03-15 |