Duvall; William R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Duvall; William R..The latest application filed is for "proximity monitoring and locating system".
- Duvall; William R. - Sudbury MA
| Patent | Date |
|---|---|
| Proximity monitoring and locating system Grant 8,169,328 - Duvall , et al. May 1, 2 | 2012-05-01 |
| Asset recovery system Grant 8,013,735 - Arpin , et al. September 6, 2 | 2011-09-06 |
| Proximity monitoring and locating system App 20100309002 - Duvall; William R. ; et al. | 2010-12-09 |
| Asset recovery system App 20090207050 - Arpin; Claude ; et al. | 2009-08-20 |
| Vehicles tracking transponder system and transponding method Grant 5,917,423 - Duvall June 29, 1 | 1999-06-29 |
| SEC | 0001240907 | DUVALL WILLIAM R |
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