Rixson-Firemark Inc.
7Patents
0Active
7Granted
26Portfolio score
Filing activity: Nov 29, 1974 → Aug 7, 1989
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4161804A | Heat-actuated door latch | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4915431A | Electromagnetic lock having a self-adjusting switch assembly for door-movement alert | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5005881A | Door locking mechanism | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4069544A | Electrically actuated door holder and release | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4072917A | Switch actuating hinge | Electricity | 10 | Expired |
| US3968379A | Photocell smoke detector | Physics | 9 | Expired |
| US3982237A | Combination door chime and particulate products of combustion detector | Physics | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.