Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9117360 | Low battery trouble signal delay in smoke detectors | — | 2015-08-25 |
| 8681011 | Apparatus and method for detecting fires | — | 2014-03-25 |
| 8063734 | Access control system wherein the remote device is automatically updated with a central user list from the central station upon use of the remote device | — | 2011-11-22 |
| 7847700 | System and method for an optical particle detector | — | 2010-12-07 |
| 7747286 | Wireless access control system with energy-saving piezo-electric locking | — | 2010-06-29 |
| 7526934 | Door wireless access control system including reader, lock, and wireless access control electronics including wireless transceiver | — | 2009-05-05 |
| 5947207 | Dual sprinkler system | George A. Schoenfelder | 1999-09-07 |
| 5191855 | Battery missing indicator | — | 1993-03-09 |
| 4901056 | Test initiation apparatus with continuous or pulse input | Nicholas J. Bellavia, Daniel J. Birk, Ronald Sisselman | 1990-02-13 |
| 4827244 | Test initiation apparatus with continuous or pulse input | Nicholas J. Bellavia, Daniel J. Birk, Ronald Sisselman | 1989-05-02 |