Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6273506 | Chair with an adjustable seat | Tom S Niergarth, Graham J. Britain, Richard Holbrook | 2001-08-14 |
| 5765914 | Chair with a tilt control mechanism | Graham J. Britain, Tom S Niergarth, Richard Holbrook, Pat Von Ehr | 1998-06-16 |