Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6302486 | Seating unit with adjustable armrest | Arnold B. Dammermann, Glenn A. Knoblock, Robert S. Grooters, Larry DeKraker, John Hanna J. Hasbany | 2001-10-16 |
| 6176550 | Adjustable armrest for chairs | Arnold B. Dammermann, Glenn A. Knoblock, Robert S. Grooters, Larry DeKraker, John Hanna J. Hasbany | 2001-01-23 |
| 6168237 | Adjustable armrest for chairs | Arnold B. Dammermann, Glenn A. Knoblock, Robert S. Grooters, Larry DeKraker, John Hanna J. Hasbany | 2001-01-02 |
| 5988754 | Stool with foot support | John Hanna J. Hasbany, William M. Van Luyn, Mark A. McCaul | 1999-11-23 |
| 5971484 | Adjustable armrest for chairs | Arnold B. Dammermann, Glenn A. Knoblock, Robert S. Grooters, Larry DeKraker, John Hanna J. Hasbany | 1999-10-26 |
| 5755490 | Office chair structure | — | 1998-05-26 |