John D. Watson
87Patents
20h-index
77Co-inventors
91Inventor score
Filing activity: Dec 11, 1974 → Dec 12, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7349797B2 | Emission management for a hybrid locomotive | Emerging Cross-Sectional Technologies | 81 | Active |
| US4849699A | Extended range, pulsed induction logging tool and method of use | Physics | 45 | Expired |
| US4269331A | Metered dispensing device | Emerging Cross-Sectional Technologies | 37 | Expired |
| US7507500B2 | Design of a large battery pack for a hybrid locomotive | Emerging Cross-Sectional Technologies | 37 | Expired |
| US7518254B2 | Multiple prime power source locomotive control | Emerging Cross-Sectional Technologies | 37 | Active |
| US5308149A | Non-explosive drill hole pressurization method and apparatus for controlled fragmentation of hard compact rock and concrete | Fixed Constructions | 36 | Expired |
| US6929330B2 | Method and system for mining hydrocarbon-containing materials | Fixed Constructions | 34 | Expired |
| US7124691B2 | Method for monitoring and controlling locomotives | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4164325A | High-pressure-rotary-nozzle apparatus | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6554368B2 | Method and system for mining hydrocarbon-containing materials | Fixed Constructions | 29 | Expired |
| US6035784A | Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US7940016B2 | Regenerative braking methods for a hybrid locomotive | Emerging Cross-Sectional Technologies | 29 | Active |
| US5576815A | Development apparatus for a liquid electrographic imaging system | Physics | 27 | Expired |
| US7667347B2 | Multi-power source locomotive control method and system | Emerging Cross-Sectional Technologies | 26 | Active |
| US8127865B2 | Method of drilling from a shaft for underground recovery of hydrocarbons | Fixed Constructions | 25 | Active |
| US7906862B2 | Multiple prime power source locomotive control | Emerging Cross-Sectional Technologies | 25 | Active |
| US7192092B2 | Method and means for recovering hydrocarbons from oil sands by underground mining | Fixed Constructions | 24 | Expired |
| US5765923A | Cartridge for generating high-pressure gases in a drill hole | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US6435096B1 | Method and apparatus for controlled small-charge blasting by decoupled explosive | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US6086716A | Wet end control for papermaking machine | Emerging Cross-Sectional Technologies | 22 | Expired |
| US7097255B2 | Method and means for processing oil sands while excavating | Fixed Constructions | 20 | Expired |
| US8499874B2 | Gas turbine energy storage and conversion system | Emerging Cross-Sectional Technologies | 20 | Active |
| US7944081B2 | Multi-power source locomotive control method and system | Emerging Cross-Sectional Technologies | 19 | Active |
| US5419448A | Knock down bulk storage container | Performing Operations; Transporting | 19 | Expired |
| US7448692B2 | Method and means for processing oil sands while excavating | Fixed Constructions | 18 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.