Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5632339 | Fire protection sprinkler head with spaced zones for mounting a protective guard and for connecting the sprinkler head to a water supply line | John W. Fenske | 1997-05-27 |
| 5195592 | Sprinkler head having cap ejection system | — | 1993-03-23 |
| 5072792 | Concealed sprinkler head assembly | William Galaszewski | 1991-12-17 |
| 4977963 | Partially concealed fast response sprinkler head | — | 1990-12-18 |
| 4757865 | Fast response sprinkler head | — | 1988-07-19 |
| 4662455 | Sprinkler head | — | 1987-05-05 |
| 4376465 | Sprinkler head | John W. Fenske | 1983-03-15 |
| 4282413 | Liquid flow indicator | John W. Fenske | 1981-08-04 |