Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5641046 | Bi-directional clutch | — | 1997-06-24 |
| 5611639 | Locking fastener construction | — | 1997-03-18 |
| 4852379 | Metal forming methods and products formed thereby | — | 1989-08-01 |
| D300152 | Stationery rack or similar article | — | 1989-03-07 |
| 4664040 | Desk organizer | — | 1987-05-12 |
| 4630739 | Stationery rack construction | — | 1986-12-23 |
| 4573736 | Chair for handicapped persons | — | 1986-03-04 |
| 4538853 | Chair for handicapped persons | — | 1985-09-03 |
| 4449631 | Tamper proof packaging | Alvin T. Levenberg | 1984-05-22 |
| 4329967 | Adjustable flue control for furnaces | — | 1982-05-18 |
| 4301785 | Adjustable flue control for furnaces | — | 1981-11-24 |