THOMAS INDUSTRIES, INC.
🏢 View company profile →159Patents
3Active
159Granted
43Portfolio score
Filing activity: Feb 21, 1974 → Dec 29, 2008 · 3 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4754377A | Thermally protected recessed lighting fixture | Mechanical Engineering; Lighting; Heating | 196 | Expired |
| US5588737A | Modular recessed lighting system | Electricity | 145 | Expired |
| US6832900B2 | Piston mounting and balancing system | Emerging Cross-Sectional Technologies | 102 | Expired |
| US4414493A | Light dimmer for solid state ballast | Emerging Cross-Sectional Technologies | 93 | Expired |
| US4803603A | Plaster frame | Mechanical Engineering; Lighting; Heating | 92 | Expired |
| US5746507A | Recessed lighting fixture for two light sizes | Mechanical Engineering; Lighting; Heating | 73 | Expired |
| US5057979A | Recessed lighting fixture | Mechanical Engineering; Lighting; Heating | 67 | Expired |
| US4910651A | High wattage insulated ceiling lighting fixture | Mechanical Engineering; Lighting; Heating | 59 | Expired |
| US4861273A | Low-voltage miniature track lighting system | Electricity | 57 | Expired |
| US4723098A | Electronic ballast circuit for fluorescent lamps | Emerging Cross-Sectional Technologies | 56 | Expired |
| US3961868A | Air compressor | Mechanical Engineering; Lighting; Heating | 54 | Expired |
| US5193647A | Easy opening door control device | Emerging Cross-Sectional Technologies | 48 | Expired |
| USD419567S | Pump | General | 48 | Expired |
| US5243735A | Regenerative feedback door control device with one-way clutch | Emerging Cross-Sectional Technologies | 47 | Expired |
| US5227762A | Power line carrier controlled lighting system | Electricity | 46 | Expired |
| USD390999S | Quarter sphere sconce light fixture | General | 45 | Expired |
| US5475360A | Power line carrier controlled lighting system | Electricity | 45 | Expired |
| US4931917A | Trapeze lighting fixture | Mechanical Engineering; Lighting; Heating | 43 | Expired |
| US6193475A | Compressor assembly | Mechanical Engineering; Lighting; Heating | 42 | Expired |
| US5213125A | Valve plate with a recessed valve assembly | Emerging Cross-Sectional Technologies | 41 | Expired |
| US4742923A | Gravity fed display and dispensing apparatus | Human Necessities | 41 | Expired |
| USD382883S | Air compressor | General | 41 | Expired |
| US4148019A | Security alarm transmission system | Physics | 40 | Expired |
| US4477748A | Solid state ballast | Emerging Cross-Sectional Technologies | 40 | Expired |
| US6056521A | Two-cylinder air compressor | Mechanical Engineering; Lighting; Heating | 39 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.