H-TECH AG
61Patents
10Active
61Granted
41Portfolio score
Filing activity: Feb 2, 1987 → May 6, 2015 · 4 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5435031A | Automatic pool cleaning apparatus | Fixed Constructions | 115 | Expired |
| US7125146B2 | Underwater LED light | Mechanical Engineering; Lighting; Heating | 94 | Expired |
| US5507058A | Automatic pool cleaning apparatus | Fixed Constructions | 90 | Expired |
| US5624559A | Bag filter and retainer therefor | Performing Operations; Transporting | 84 | Expired |
| USD445225S | Pool cleaner | General | 50 | Expired |
| USD433545S | Swimming pool cleaner housing | General | 41 | Expired |
| US7318448B2 | Swimming pool cleaning apparatus and parts therefor | Emerging Cross-Sectional Technologies | 40 | Expired |
| USD384782S | Swimming pool cleaner housing | General | 40 | Expired |
| USD417322S | Swimming pool cleaner housing | General | 40 | Expired |
| USD536705S1 | Pump housing | General | 39 | Expired |
| USD550805S1 | Strainer basket | General | 39 | Expired |
| USD557374S1 | Strainer basket | General | 38 | Expired |
| USD400319S | Swimming pool cleaner housing | General | 37 | Expired |
| US6197195A | Fluid handling apparatus and flow control assembly therefor | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5604950A | Anti-clogging, variable throat suction nozzle and suction cleaning device equipped therewith | Fixed Constructions | 37 | Expired |
| US6026804A | Heater for fluids | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US5591329A | Fluid filter with pleated septum | Performing Operations; Transporting | 36 | Expired |
| US4797040A | Strap on drill paraphernalia holding system (DPHS) | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5871641A | Fluid filter with pleated septum | Performing Operations; Transporting | 33 | Expired |
| US5993753A | Chlorinator/sanitizer and method of using same | Chemistry; Metallurgy | 33 | Expired |
| US5587074A | Fluid filter with enhanced backflush flow | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5551467A | Ball valve with controlled flow variation | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5432688A | Plastic niche and grounding assembly therefor | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US6004458A | Filter/sanitizer | Chemistry; Metallurgy | 25 | Expired |
| US6221321A | Chemical feeder | Chemistry; Metallurgy | 24 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.