Alan R. Levin
19Patents
10h-index
17Co-inventors
69Inventor score
Filing activity: Jun 2, 1977 → Mar 9, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6536435B1 | Respirator headpiece and release mechanism | Human Necessities | 214 | Expired |
| US7931447B2 | Drain safety and pump control device | Mechanical Engineering; Lighting; Heating | 93 | Active |
| US5624559A | Bag filter and retainer therefor | Performing Operations; Transporting | 84 | Expired |
| US6497232B2 | Respirator headpiece and release mechanism | Human Necessities | 68 | Expired |
| US5551467A | Ball valve with controlled flow variation | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4151855A | Ball valve assembly tools and method of using same | Emerging Cross-Sectional Technologies | 24 | Expired |
| US7297265B1 | Backwash strainer having a cyclonic flow mechanism | Performing Operations; Transporting | 15 | Active |
| USD473937S1 | Respirator | General | 14 | Expired |
| US5671769A | Swing check valve and method for repairing same | Emerging Cross-Sectional Technologies | 11 | Expired |
| USD373176S | Combined valve indicator and handle | General | 10 | Expired |
| US4279404A | Guide arrangement for expanding gate valves | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5609185A | Valve indicator and handle assembly | Emerging Cross-Sectional Technologies | 8 | Expired |
| US9046247B2 | Low-profile niche for underwater pool/spa lights | Mechanical Engineering; Lighting; Heating | 7 | Active |
| USD377825S | Bag filter vessel | General | 5 | Expired |
| US8936721B2 | Unitary filter tank and an underdrain for filtering a body of water | Chemistry; Metallurgy | 5 | Active |
| US9108126B2 | Unitary filter tank and an underdrain for filtering a body of water | Performing Operations; Transporting | 5 | Active |
| US10941920B2 | Low-profile niche for underwater pool/spa lights | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US11940052B2 | Flow control valve for suction cleaners | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US11378257B2 | Low-profile niche for underwater pool/spa lights | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.