John B. French
64Patents
22h-index
23Co-inventors
88Inventor score
Filing activity: Sep 15, 1972 → Apr 22, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5735742A | Gaming table tracking system and method | Human Necessities | 518 | Expired |
| US5651548A | Gaming chips with electronic circuits scanned by antennas in gaming chip placement areas for tracking the movement of gaming chips within a casino apparatus and method | Human Necessities | 510 | Expired |
| US4963736A | Mass spectrometer and method and improved ion transmission | Electricity | 134 | Expired |
| US8221244B2 | Table with sensors and smart card holder for automated gaming system and gaming cards | Human Necessities | 123 | Active |
| US6825726B2 | Power amplifier with multiple power supplies | Electricity | 84 | Expired |
| US7360419B2 | Gravity gradiometer | Physics | 68 | Active |
| US4023398A | Apparatus for analyzing trace components | Electricity | 67 | Expired |
| US5510753A | Composite bridge amplifier with output overload and thermal protection | Electricity | 66 | Expired |
| US5969352A | Spray chamber with dryer | Electricity | 62 | Expired |
| US3944455A | Labelling system and cassette label applicator usable therewith | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4276112A | Individualized label application system | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5345079A | Apparatus and method for liquid sample introduction | Physics | 47 | Expired |
| US6160455A | Derived power supply for composite bridge amplifiers | Electricity | 46 | Expired |
| US5075634A | Composite bridge amplifier | Electricity | 44 | Expired |
| US6837106B2 | Gravity gradiometry | Physics | 38 | Expired |
| US5184152A | Printing apparatus and method for printing on an elongated member such as a tube | Emerging Cross-Sectional Technologies | 37 | Expired |
| US4137750A | Method and apparatus for analyzing trace components using a gas curtain | Electricity | 36 | Expired |
| US3984277A | Label applicator | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4746794A | Mass analyzer system with reduced drift | Electricity | 31 | Expired |
| US4121099A | Method and apparatus for focussing and declustering trace ions | Electricity | 31 | Expired |
| US4328420A | Tandem mass spectrometer with open structure AC-only rod sections, and method of operating a mass spectrometer system | Electricity | 31 | Expired |
| US8235825B2 | Smart card holder for automated gaming system and gaming cards | Physics | 24 | Active |
| US6108219A | DC power converter circuit | Electricity | 22 | Expired |
| US4148196A | Multiple stage cryogenic pump and method of pumping | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5548163A | Device for securing car audio equipment | Emerging Cross-Sectional Technologies | 13 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.