Sutherland; David P.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Sutherland; David P..The latest application filed is for "cylinder lock and auxiliary locking mechanism".
- Sutherland; David P. - Roanoke VA
| Patent | Date |
|---|---|
| Cylinder lock and auxiliary locking mechanism Grant 8,186,194 - Field , et al. May 29, 2 | 2012-05-29 |
| Hierarchical cylinder lock systems Grant 7,797,973 - Field , et al. September 21, 2 | 2010-09-21 |
| Cylinder Lock and Auxiliary Locking Mechanism App 20090241620 - FIELD; Peter H. ; et al. | 2009-10-01 |
| Hierarchical Cylinder Lock Systems App 20080223097 - Field; Peter H. ; et al. | 2008-09-18 |
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