David J. First
4Patents
3h-index
7Co-inventors
47Inventor score
Filing activity: Dec 29, 1975 → Mar 4, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4412788A | Control system for screw compressor | Mechanical Engineering; Lighting; Heating | 57 | Expired |
| US4249866A | Control system for screw compressor | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US4031532A | Voltage to frequency converter | Electricity | 23 | Expired |
| US8333568B2 | Device and methods of measuring pressure | Physics | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.