Willis; Douglas G.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Willis; Douglas G..The latest application filed is for "articulating carriage".
- Willis; Douglas G. - Fresno CA
- Willis; Douglas G. - Colby KS
- Willis; Douglas G. - Billings MT
| Patent | Date |
|---|---|
| Wheel pad Grant 10,137,731 - Willis Nov | 2018-11-27 |
| Articulating carriage Grant 9,950,564 - Willis April 24, 2 | 2018-04-24 |
| Articulating Carriage App 20170361651 - Clapp; William Morris ; et al. | 2017-12-21 |
| Mobility device having walking wheel assembly for moving an object across non-planar areas Grant 9,844,980 - Willis December 19, 2 | 2017-12-19 |
| Wheel float with improved pivot joints Grant 9,744,807 - Willis August 29, 2 | 2017-08-29 |
| Wheel Float with Improved Pivot Joints App 20170166006 - Willis; Douglas G. | 2017-06-15 |
| Wheel Pad App 20170071340 - Willis; Douglas G. | 2017-03-16 |
| Quad-caster carriage with forklift attachment Grant 7,506,405 - Willis March 24, 2 | 2009-03-24 |
| Articulated caster Grant 7,500,285 - Willis March 10, 2 | 2009-03-10 |
| Articulated Caster With Pivot Box Joint App 20070220704 - Willis; Douglas G. | 2007-09-27 |
| Detachable Drive Unit For Mobile Carriage App 20070221419 - Willis; Douglas G. | 2007-09-27 |
| Articulated Castor Braking System App 20070039786 - Willis; Douglas G. | 2007-02-22 |
| Articulated Caster App 20060288523 - Willis; Douglas G. | 2006-12-28 |
| Articulated caster Grant 7,146,683 - Willis December 12, 2 | 2006-12-12 |
| Articulated Caster App 20060196006 - Willis; Douglas G. | 2006-09-07 |
| Quad-caster Carriage With Forklift Attachment App 20060196007 - Willis; Douglas G. | 2006-09-07 |
| Articulated caster Grant 5,507,069 - Willis April 16, 1 | 1996-04-16 |
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