William L. Kopko
67Patents
15h-index
59Co-inventors
87Inventor score
Filing activity: Oct 31, 1990 → Jun 13, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7065953B1 | Supercharging system for gas turbines | Emerging Cross-Sectional Technologies | 248 | Expired |
| US6442942B1 | Supercharging system for gas turbines | Emerging Cross-Sectional Technologies | 67 | Expired |
| US5406805A | Tandem refrigeration system | Mechanical Engineering; Lighting; Heating | 61 | Expired |
| US6121749A | Variable-speed drive for single-phase motors | Electricity | 61 | Expired |
| US6513339B1 | Solar air conditioner | Emerging Cross-Sectional Technologies | 45 | Expired |
| US6035637A | Free-piston internal combustion engine | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5947854A | Combined variable-speed drive and speed reducer for pumps and fans | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US5076064A | Method and refrigerants for replacing existing refrigerants in centrifugal compressors | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US6286326A | Control system for a refrigerator with two evaporating temperatures | Emerging Cross-Sectional Technologies | 30 | Expired |
| US6718771B1 | Gas turbine operative at high ambient temperatures | Emerging Cross-Sectional Technologies | 23 | Expired |
| US8166776B2 | Multichannel heat exchanger | Mechanical Engineering; Lighting; Heating | 19 | Active |
| US8234881B2 | Multichannel heat exchanger with dissimilar flow | Mechanical Engineering; Lighting; Heating | 18 | Active |
| US6308512A | Supercharging system for gas turbines | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US8813511B2 | Control system for operating condenser fans | Mechanical Engineering; Lighting; Heating | 16 | Active |
| US6405543B2 | High-efficiency air-conditioning system with high-volume air distribution | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US7908881B2 | HVAC system with powered subcooler | Emerging Cross-Sectional Technologies | 15 | Active |
| US6185943A | High-efficiency air-conditioning system with high-volume air distribution | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US8539789B2 | Heat-pump chiller with improved heat recovery features | Mechanical Engineering; Lighting; Heating | 13 | Active |
| US7757753B2 | Multichannel heat exchanger with dissimilar multichannel tubes | Emerging Cross-Sectional Technologies | 13 | Active |
| US8439104B2 | Multichannel heat exchanger with improved flow distribution | Mechanical Engineering; Lighting; Heating | 12 | Active |
| US6994156B2 | Air-conditioning system with thermal storage | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6880343B2 | Supercharged gas turbine with improved control | Emerging Cross-Sectional Technologies | 11 | Expired |
| US10830503B2 | Heat pump system with multiple operating modes | Mechanical Engineering; Lighting; Heating | 9 | Active |
| US7942020B2 | Multi-slab multichannel heat exchanger | Emerging Cross-Sectional Technologies | 8 | Active |
| US8938988B2 | Multichannel heat exchanger with dissimilar flow | Mechanical Engineering; Lighting; Heating | 8 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.