Crenshaw; Robert J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Crenshaw; Robert J..The latest application filed is for "enhanced message security".
- Crenshaw; Robert J. - Apex NC
- Crenshaw, Robert J. - Cary NC
| Patent | Date |
|---|---|
| Enhanced message security Grant 9,553,893 - Barrus , et al. January 24, 2 | 2017-01-24 |
| Enhanced Message Security App 20090310785 - Barrus; William G. ; et al. | 2009-12-17 |
| Enhanced message security Grant 7,475,248 - Barrus , et al. January 6, 2 | 2009-01-06 |
| Cooperative spam control App 20050223076 - Barrus, William G. ; et al. | 2005-10-06 |
| Enhanced message security App 20030204721 - Barrus, William G. ; et al. | 2003-10-30 |
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