John Cowles
15Patents
7h-index
6Co-inventors
59Inventor score
Filing activity: Oct 10, 1984 → Nov 24, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5442568A | Vending machine audit monitoring system | Physics | 75 | Expired |
| US5924081A | Vending machine audit monitoring system with matrix interface | Physics | 37 | Expired |
| USD633213S1 | Bandage roll | General | 21 | Expired |
| USRE40588E1 | Vending machine audit monitoring system with matrix interface | General | 18 | Expired |
| USD637299S1 | Tape bandage roll | General | 16 | Expired |
| US8362836B2 | Incremental gain amplifier | Electricity | 10 | Active |
| US4604557A | Vending machine power switching apparatus | Electricity | 9 | Expired |
| US8072205B1 | Peak-to-average measurement with envelope pre-detection | Physics | 6 | Active |
| US7812673B1 | Amplifier having input/output cells with discrete gain steps | Electricity | 6 | Active |
| US7880542B1 | Incremental gain amplifier | Electricity | 4 | Active |
| USRE39234E1 | Vending machine audit monitoring system | General | 4 | Expired |
| US9614496B1 | Filter circuits with emitter follower transistors and servo loops | Electricity | 3 | Active |
| USRE33314E | Vending machine power switching apparatus | General | 2 | Expired |
| US8125275B1 | Amplifier having input/output cells with discrete gain steps | Electricity | 0 | Active |
| US8854133B2 | Incremental gain amplifier | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.