Whelen Technologies, Inc.
24Patents
0Active
24Granted
35Portfolio score
Filing activity: Apr 21, 1983 → Apr 1, 1993
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5335157A | Anti-collision light assembly | Mechanical Engineering; Lighting; Heating | 55 | Expired |
| US5337082A | Traffic management system | Physics | 44 | Expired |
| US5016139A | Electronic power supply with enhanced heat transfer characteristics | Electricity | 36 | Expired |
| US5027260A | Vehicular lightbar assembly | Performing Operations; Transporting | 32 | Expired |
| US4908601A | Loud speaker with horizontal radiation pattern | Physics | 26 | Expired |
| US4866329A | Wide angle warning light | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US5040103A | Light assembly for wide area illumination | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| USD320363S | Directional light warning system for vehicles or the like | General | 23 | Expired |
| USD319425S | Housing for an electronic power supply for warning lights | General | 22 | Expired |
| USD356169S | Ambulance interior light | General | 22 | Expired |
| US4954938A | Light with wide angle radiation pattern | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4792717A | Wide angle warning light | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4985814A | Warning light with quadruple reflective surfaces | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4754375A | Combination reflector for wide angle warning light | Performing Operations; Transporting | 14 | Expired |
| US5170162A | Motion direction detection | Physics | 11 | Expired |
| US5157382A | Directional information conveying method and apparatus | Performing Operations; Transporting | 10 | Expired |
| US5045982A | Wide angle warning light | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5397866A | Dual acoustic horn assembly | Electricity | 8 | Expired |
| US5160874A | Rotatable warning light assembly | Performing Operations; Transporting | 8 | Expired |
| US5230560A | Anti-collision light assembly | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| USD346601S | Loud speaker system for emergency vehicles | General | 7 | Expired |
| USD347078S | Interior mounted warning light for emergency vehicles | General | 5 | Expired |
| US5013973A | Power supply for intermittently operated loads | Electricity | 3 | Expired |
| USD305660S | Loudspeaker | General | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.