Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12416120 | Base for turf system with vertical support extensions at panel edges | Daniel C. Sawyer, Richard R. Runkles | 2025-09-16 |
| 11781272 | Base for turf system with vertical support extensions at panel edges | Daniel C. Sawyer, Richard R. Runkles | 2023-10-10 |
| 11111636 | Base for turf system with vertical support extensions at panel edges | Daniel C. Sawyer, Richard R. Runkles | 2021-09-07 |
| D866800 | Turf underlayment | Richard R. Runkles, Daniel C. Sawyer, Steven Lee Sawyer | 2019-11-12 |
| 10458075 | Base for turf system with vertical support extensions at panel edges | Daniel C. Sawyer, Richard R. Runkles | 2019-10-29 |
| 10060082 | Base for turf system with vertical support extensions at panel edges | Daniel C. Sawyer, Richard R. Runkles | 2018-08-28 |
| 8469383 | Midwheel drive wheelchair with independent front and rear suspension | Daniel Z. Zhou, Mark A. Jackson, John J. Tarter, Mark E. Greig, Rex W. Stevens +2 more | 2013-06-25 |
| 8210556 | Midwheel drive wheelchair with independent front and rear suspension | Daniel Z. Zhou, Mark A. Jackson, John J. Tarter, Mark E. Greig, Rex W. Stevens +2 more | 2012-07-03 |
| 8113531 | Personal mobility vehicle having a pivoting suspension with a torque activated release mechanism | Daniel Z. Zhou, Mark A. Jackson, John J. Tarter, Mark E. Greig, Rex W. Stevens +2 more | 2012-02-14 |
| 7896394 | Midwheel drive wheelchair with independent front and rear suspension | Mark A. Jackson, John J. Tarter, Mark E. Greig, Rex W. Stevens, Samuel D. Traxinger +2 more | 2011-03-01 |
| 7857394 | Wheelchair seat back with two-point mounting hardware | Thomas J. Whelan, James L. Christofferson, Vincent J. Frerich, Sy Tran | 2010-12-28 |
| 6976699 | Coordinated articulation of wheelchair members | — | 2005-12-20 |
| 6715784 | Method programming and operating a wheelchair having tilt and recline functions | Mark E. Greig | 2004-04-06 |
| D480195 | Frame member | Adam Wood | 2003-09-30 |
| 6588792 | Method of programming and operating tilt and recline functions in a wheelchair | Mark E. Greig | 2003-07-08 |
| 6450581 | Power legrest for a wheelchair | — | 2002-09-17 |
| 6409265 | Tilting and reclining wheelchair | Karen A. Hada | 2002-06-25 |
| 6250661 | Tilt system for a powered wheelchair seat | Paul C. Dickie | 2001-06-26 |
| 5297021 | Zero shear recliner/tilt wheelchair seat | J. Leslie Tausz | 1994-03-22 |