Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10203238 | Liquid detection apparatus | Marshal Dean Barrett, David Holcomb | 2019-02-12 |
| 6822553 | Secure entry system with radio reprogramming | Walter G. Henderson, Wayne F. Larson | 2004-11-23 |
| 5602536 | Data synchronization method for use with portable, microprocessor-based device | Walter G. Henderson, Wayne F. Larson | 1997-02-11 |
| 4988987 | Keysafe system with timer/calendar features | Walter G. Henderson, Wayne F. Larson | 1991-01-29 |
| 4916443 | Method and apparatus for compiling data relating to operation of an electronic lock system | Gerald R. Daum, Wayne F. Larson | 1990-04-10 |
| 4887292 | Electronic lock system with improved data dissemination | Walter G. Henderson, Wayne F. Larson | 1989-12-12 |