Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6018841 | Finishing trowel including handle | Duane W. Woltjen, Kent Douglas Williams | 2000-02-01 |
| 5781956 | Plastic molded float handle | Alan Jerome Ness | 1998-07-21 |
| 5713096 | Finishing trowel handle | Duane W. Woltjen, Kent Douglas Williams | 1998-02-03 |
| 5615445 | Taping knife handle | Alan Jerome Ness | 1997-04-01 |
| 5522111 | Finishing trowel handle | Duane W. Woltjen, Kent Douglas Williams | 1996-06-04 |
| 5446941 | Plastic molded trowel handle having fingerguard and palm grip | — | 1995-09-05 |
| 5327612 | Plastic molded trowel handle having fingerguard and palm grip | — | 1994-07-12 |