Robert H. Perkinson
40Patents
11h-index
23Co-inventors
75Inventor score
Filing activity: Nov 15, 1982 → Aug 23, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6900056B2 | Chemically defined medium for cultured mammalian cells | Chemistry; Metallurgy | 58 | Expired |
| US5897293A | Counterweighted propeller control system | Performing Operations; Transporting | 58 | Expired |
| US6811376B2 | Actuation system for a controllable pitch propeller | Performing Operations; Transporting | 51 | Expired |
| US7341426B2 | Gas turbine engine blade tip clearance apparatus and method | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US6981844B2 | Cyclic actuation system for a controllable pitch propeller and a method of providing aircraft control therewith | Performing Operations; Transporting | 18 | Expired |
| US8439640B2 | Propeller blade pitch control system | Emerging Cross-Sectional Technologies | 17 | Active |
| US4760662A | Hybrid fuel metering system | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US8162611B2 | Controllable pitch propeller with electrical power generation | Performing Operations; Transporting | 16 | Active |
| US8167553B2 | Electrical system for driving a propeller pitch change mechanism | Performing Operations; Transporting | 15 | Active |
| US6511292B2 | Backup governing system for a variable pitch propeller | Performing Operations; Transporting | 11 | Expired |
| US4805658A | Variable pressure regulating valve | Emerging Cross-Sectional Technologies | 11 | Expired |
| US8172530B2 | Pitch change actuation system for a counter-rotating propeller | Performing Operations; Transporting | 7 | Active |
| US8277182B2 | Remote pitch controller for a variable pitch propeller | Mechanical Engineering; Lighting; Heating | 7 | Active |
| US9051044B2 | Counter-rotating open-rotor (CROR) | Emerging Cross-Sectional Technologies | 7 | Active |
| US9718536B2 | Counter-rotating open-rotor (CROR) | Emerging Cross-Sectional Technologies | 6 | Active |
| US8529205B2 | Passive cyclic pitch control | Performing Operations; Transporting | 6 | Active |
| US9973058B2 | Propeller in-hub power generation and control | Electricity | 5 | Active |
| US8740565B2 | Modular counter rotating propeller system | Emerging Cross-Sectional Technologies | 5 | Active |
| US8167501B2 | Separator for bearing assemblies with cyclic loads | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US10094293B2 | In flight restart system and method for free turbine engine | Emerging Cross-Sectional Technologies | 5 | Active |
| US4501157A | Vortex shedding flow measuring transducer | Physics | 5 | Expired |
| US8757972B2 | De-icing system for modular counter rotating propeller | Performing Operations; Transporting | 4 | Active |
| US8545178B2 | Controlled propeller pitch lock actuation system | Performing Operations; Transporting | 4 | Active |
| US8770934B2 | Teeter mechanism for a multiple-bladed wind turbine | Emerging Cross-Sectional Technologies | 4 | Active |
| US9604729B2 | Aircraft control system and method | Performing Operations; Transporting | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.