Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D310535 | Screen stand | William H. Barrett, Joseph Allen Gregory, David L. Schaum | 1990-09-11 |
| D304635 | Cart | William H. Barrett, Joseph Allen Gregory, David L. Schaum | 1989-11-14 |
| D300030 | Remote control unit | William H. Barrett, Joseph Allen Gregory, Louis J. Remsburger, David L. Schaum | 1989-02-28 |