Issued Patents All Time
Showing 25 most recent of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8851530 | Electric latch retraction bar | Arthur Geringer, David Geringer | 2014-10-07 |
| 8851532 | Electric strike | Arthur Geringer, David Geringer | 2014-10-07 |
| 7963574 | Fail safe/fail secure lock with quick change access window | Arthur Geringer, David Geringer | 2011-06-21 |
| 7698918 | Interchangeable lock operable in fail safe or fail secure modes | Arthur Geringer, David Geringer | 2010-04-20 |
| 7614669 | Interchangeable lock operable in fail safe or fail secure modes | Arthur Geringer, David Geringer | 2009-11-10 |
| 7540542 | Electric strike | Arthur Geringer, David Geringer | 2009-06-02 |
| 7246827 | Fail safe/fail secure lock with quick change access window | Arthur Geringer, David Geringer | 2007-07-24 |
| 6363763 | Lock with sensor | Arthur Geringer, David Geringer | 2002-04-02 |
| 6048000 | Delayed egress panic device with internal deadlocking bolt mechanism | Arthur Geringer, David Geringer | 2000-04-11 |
| 5969440 | Push bar with redundant pressure sensors and fail safe mechanical switch | Christopher L. Young, David Geringer | 1999-10-19 |
| 5876073 | Electrically operable door locking apparatus and method for operating the same | Arthur Geringer, David Geringer | 1999-03-02 |
| 5564228 | Pressure-actuated exit door access bar for an electronic delayed egress locking system | Arthur Geringer, David Geringer | 1996-10-15 |
| 5525880 | Pressure-actuated exit door access bar for an electronic delayed egress locking system | Arthur Geringer, David Geringer | 1996-06-11 |
| 5429399 | Electronic delayed egress locking system | Arthur Geringer, David Geringer | 1995-07-04 |
| 5376910 | Electromagnet coil assembly and mounting apparatus and method for use in installing same | Arthur Geringer, David Geringer | 1994-12-27 |
| 5257841 | Electrical monitoring strike device | Arthur Geringer, David Geringer | 1993-11-02 |
| 5141271 | Alignment device for electromagnetic door lock | Arthur Geringer, David Geringer | 1992-08-25 |
| 5033779 | Electromagnetic door lock device | Arthur Geringer, David Geringer | 1991-07-23 |
| 5006723 | Electromagnetic door lock device | Arthur Geringer, David Geringer | 1991-04-09 |
| 5000497 | Electromagnetic door lock device | Arthur Geringer, David Geringer | 1991-03-19 |
| 4986581 | Electromagnetic door lock device | Arthur Geringer, David Geringer | 1991-01-22 |
| 4826223 | Electromagnetic door lock device | Arthur Geringer, David Geringer | 1989-05-02 |
| 4641867 | Door closure assembly | Arthur Geringer, David Geringer | 1987-02-10 |
| 4634155 | Power actuated door locking and monitoring assembly | Arthur Geringer, David Geringer | 1987-01-06 |
| 4623178 | Lock assembly | Arthur Geringer, David Geringer | 1986-11-18 |