Sundstrand Corporation
1,380Patents
0Active
1,380Granted
48Portfolio score
Filing activity: Feb 23, 1971 → Dec 23, 1998
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4979362A | Aircraft engine starting and emergency power generating system | Emerging Cross-Sectional Technologies | 267 | Expired |
| US4736151A | Bi-directional buck/boost DC/DC converter | Electricity | 246 | Expired |
| US4604567A | Maximum power transfer system for a solar cell array | Emerging Cross-Sectional Technologies | 203 | Expired |
| US5708576A | Fault tolerant power converter | Electricity | 180 | Expired |
| US5594322A | Starter/generator system with variable-frequency exciter control | Electricity | 139 | Expired |
| US5240380A | Variable speed control for centrifugal pumps | Mechanical Engineering; Lighting; Heating | 132 | Expired |
| US5241861A | Micromachined rate and acceleration sensor | Emerging Cross-Sectional Technologies | 125 | Expired |
| US5512811A | Starter/generator system having multivoltage generation capability | Electricity | 124 | Expired |
| US5899411A | Aircraft electrical system providing emergency power and electric starting of propulsion engines | Electricity | 117 | Expired |
| US5430362A | Engine starting system utilizing multiple controlled acceleration rates | Mechanical Engineering; Lighting; Heating | 113 | Expired |
| US4708030A | Multi-range starter-generator drive | Mechanical Engineering; Lighting; Heating | 111 | Expired |
| US5493200A | Control for a brushless generator | Electricity | 111 | Expired |
| US5088005A | Cold plate for cooling electronics | Electricity | 109 | Expired |
| US5174109A | Clutch to disconnect loads during turbine start-up | Emerging Cross-Sectional Technologies | 104 | Expired |
| US4494171A | Impingement cooling apparatus for heat liberating device | Emerging Cross-Sectional Technologies | 104 | Expired |
| US5600548A | DC content control for an inverter | Electricity | 100 | Expired |
| US4627237A | Hydrostatic transmission with fixed fluid capacity ratio between pump and motor | Mechanical Engineering; Lighting; Heating | 99 | Expired |
| US4575318A | Unloading of scroll compressors | Mechanical Engineering; Lighting; Heating | 98 | Expired |
| US4746859A | Power and temperature independent magnetic position sensor for a rotor | Physics | 95 | Expired |
| US5384527A | Rotor position detector with back EMF voltage estimation | Electricity | 91 | Expired |
| US4674178A | Method of fabricating a permanent magnet rotor | Emerging Cross-Sectional Technologies | 90 | Expired |
| US5013949A | Magnetic transmission | Emerging Cross-Sectional Technologies | 89 | Expired |
| US5068590A | Brushless generator having AC excitation in generating and starting modes | Mechanical Engineering; Lighting; Heating | 89 | Expired |
| US5347160A | Power semiconductor integrated circuit package | Electricity | 87 | Expired |
| US5743490A | Flap/slat actuation system for an aircraft | Performing Operations; Transporting | 85 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.