Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |