Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6876293 | Multiple access electronic lock system | George Frolov, Gary E. Lavelle, Michael Cote, Dominic Pesapane | 2005-04-05 |
| 6104594 | Electromagnetic latch retractor for exit bar | George Frolov, John E. Walsh | 2000-08-15 |
| 5142152 | Sliding door sensor | — | 1992-08-25 |
| 4967083 | Door sensor system | Henning N. Kornbrekke | 1990-10-30 |
| 4952080 | Automatic assist for swing-door operator | James J. Scott | 1990-08-28 |
| 4727679 | Swing-door operator system | Henning N. Kornbrekke, Philip J. Lombardo, Sam Crocker | 1988-03-01 |
| 4563625 | Automatic door control system | Henning N. Kornbrekke | 1986-01-07 |