Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6842105 | Dual mode data logging | Jerry P. Scansen, Wayne F. Larson | 2005-01-11 |
| 6822553 | Secure entry system with radio reprogramming | Wayne F. Larson, Philip D. Barrett | 2004-11-23 |
| 5602536 | Data synchronization method for use with portable, microprocessor-based device | Wayne F. Larson, Philip D. Barrett | 1997-02-11 |
| 5245652 | Secure entry system with acoustically coupled telephone interface | Wayne F. Larson | 1993-09-14 |
| 5046084 | Electronic real estate lockbox system with improved reporting capability | Iral D. Barrett | 1991-09-03 |
| 4988987 | Keysafe system with timer/calendar features | Philip D. Barrett, Wayne F. Larson | 1991-01-29 |
| 4947163 | Electronic security system with configurable key | John Q. Archer, II, Gerald R. Daum, George A. Ellson, John Gray, Wayne F. Larson +4 more | 1990-08-07 |
| 4929880 | Electronic lock system with battery conservation features | George A. Ellson, Edgar J. Unrein | 1990-05-29 |
| 4914732 | Electronic key with interactive graphic user interface | John Q. Archer, II, Gerald R. Daum, George A. Ellson, John Gray, Wayne F. Larson +4 more | 1990-04-03 |
| 4896246 | Electronic lock with energy conservation features | John Q. Archer, II, Gerald R. Daum, George A. Ellson, John Gray, Wayne F. Larson +4 more | 1990-01-23 |
| 4887292 | Electronic lock system with improved data dissemination | Philip D. Barrett, Wayne F. Larson | 1989-12-12 |
| 4766746 | Electronic real estate lockbox system | John Q. Archer, II, Gerald R. Daum, George A. Ellson, John Gray, Wayne F. Larson +4 more | 1988-08-30 |
| 4727368 | Electronic real estate lockbox system | Wayne F. Larson | 1988-02-23 |