Beukema; Duane M.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Beukema; Duane M..The latest application filed is for "integrated chair and control".
- Beukema; Duane M. - Grand Rapids MI
| Patent | Date |
|---|---|
| Integrated chair and control Grant 4,776,633 - Knoblock , et al. October 11, 1 | 1988-10-11 |
| Chain control locking assembly Grant 4,438,898 - Knoblauch , et al. March 27, 1 | 1984-03-27 |
| Synchrotilt chair control Grant 4,390,206 - Faiks , et al. June 28, 1 | 1983-06-28 |
| Chair control with height adjustment actuator Grant 4,373,692 - Knoblauch , et al. February 15, 1 | 1983-02-15 |
| Height adjustable chair base Grant 4,324,382 - Beukema , et al. April 13, 1 | 1982-04-13 |
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