Issued Patents All Time
Showing 25 most recent of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12110710 | Electric lock with latch retractor | David Geringer | 2024-10-08 |
| 10815692 | Electric strike | David Geringer | 2020-10-27 |
| 10107015 | Electric latch retraction push-bar device | David Geringer | 2018-10-23 |
| 9797165 | Electric latch retraction bar | David Geringer | 2017-10-24 |
| 8851530 | Electric latch retraction bar | David Geringer, Richard Geringer | 2014-10-07 |
| 8851532 | Electric strike | David Geringer, Richard Geringer | 2014-10-07 |
| 7963574 | Fail safe/fail secure lock with quick change access window | David Geringer, Richard Geringer | 2011-06-21 |
| 7698918 | Interchangeable lock operable in fail safe or fail secure modes | David Geringer, Richard Geringer | 2010-04-20 |
| 7614669 | Interchangeable lock operable in fail safe or fail secure modes | David Geringer, Richard Geringer | 2009-11-10 |
| 7540542 | Electric strike | David Geringer, Richard Geringer | 2009-06-02 |
| 7246827 | Fail safe/fail secure lock with quick change access window | David Geringer, Richard Geringer | 2007-07-24 |
| 6681607 | Lock with sensor | — | 2004-01-27 |
| 6363763 | Lock with sensor | Richard Geringer, David Geringer | 2002-04-02 |
| 6048000 | Delayed egress panic device with internal deadlocking bolt mechanism | Richard Geringer, David Geringer | 2000-04-11 |
| 5876073 | Electrically operable door locking apparatus and method for operating the same | Richard Geringer, David Geringer | 1999-03-02 |
| 5564228 | Pressure-actuated exit door access bar for an electronic delayed egress locking system | Richard Geringer, David Geringer | 1996-10-15 |
| 5525880 | Pressure-actuated exit door access bar for an electronic delayed egress locking system | Richard Geringer, David Geringer | 1996-06-11 |
| 5429399 | Electronic delayed egress locking system | Richard Geringer, David Geringer | 1995-07-04 |
| 5376910 | Electromagnet coil assembly and mounting apparatus and method for use in installing same | Richard Geringer, David Geringer | 1994-12-27 |
| 5257841 | Electrical monitoring strike device | Richard Geringer, David Geringer | 1993-11-02 |
| 5141271 | Alignment device for electromagnetic door lock | Richard Geringer, David Geringer | 1992-08-25 |
| 5033779 | Electromagnetic door lock device | Richard Geringer, David Geringer | 1991-07-23 |
| 5006723 | Electromagnetic door lock device | Richard Geringer, David Geringer | 1991-04-09 |
| 5000497 | Electromagnetic door lock device | Richard Geringer, David Geringer | 1991-03-19 |
| 4986581 | Electromagnetic door lock device | Richard Geringer, David Geringer | 1991-01-22 |