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Patent applications and USPTO patent grants for Barrett; Philip D..The latest application filed is for "secure entry system with radio reprogramming".
Patent | Date |
---|---|
Secure entry system with radio reprogramming Grant 6,822,553 - Henderson , et al. November 23, 2 | 2004-11-23 |
Data synchronization method for use with portable, microprocessor-based device Grant 5,602,536 - Henderson , et al. February 11, 1 | 1997-02-11 |
Keysafe system with timer/calendar features Grant 4,988,987 - Barrett , et al. * January 29, 1 | 1991-01-29 |
Method and apparatus for compiling data relating to operation of an electronic lock system Grant 4,916,443 - Barrett , et al. April 10, 1 | 1990-04-10 |
Electronic lock system with improved data dissemination Grant 4,887,292 - Barrett , et al. * December 12, 1 | 1989-12-12 |
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