Hamilton Sundstrand Corporation (HSC)
4,582Patents
4,330Active
4,582Granted
65Portfolio score
Filing activity: Mar 1, 1994 → Jul 23, 2024 · 459 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6415595B1 | Integrated thermal management and coolant system for an aircraft | Emerging Cross-Sectional Technologies | 160 | Expired |
| US9512783B2 | Aircraft fuel system | Emerging Cross-Sectional Technologies | 159 | Active |
| US6182435A | Thermal and energy management method and apparatus for an aircraft | Emerging Cross-Sectional Technologies | 132 | Expired |
| US8823448B1 | Feed forward active EMI filters | Electricity | 124 | Active |
| US6364938B1 | Sorbent system and method for absorbing carbon dioxide (CO2) from the atmosphere of a closed habitable environment | Emerging Cross-Sectional Technologies | 120 | Expired |
| US7882691B2 | High to low pressure spool summing gearbox for accessory power extraction and electric start | Emerging Cross-Sectional Technologies | 100 | Active |
| US6084764A | Capacitor disconnecting assembly | Electricity | 93 | Expired |
| US7302801B2 | Lean-staged pyrospin combustor | Mechanical Engineering; Lighting; Heating | 92 | Expired |
| US6122575A | APU troubleshooting system | Emerging Cross-Sectional Technologies | 85 | Expired |
| US7208854B1 | Rotor cooling system for synchronous machines with conductive sleeve | Electricity | 72 | Expired |
| US7841163B2 | Turbofan emergency generator | Mechanical Engineering; Lighting; Heating | 70 | Active |
| US6260799A | Aircraft wing fold actuation system | Performing Operations; Transporting | 63 | Expired |
| US6283410A | Secondary power integrated cabin energy system for a pressurized aircraft | Emerging Cross-Sectional Technologies | 62 | Expired |
| US6257003A | Environmental control system utilizing two air cycle machines | Emerging Cross-Sectional Technologies | 62 | Expired |
| US6727609B2 | Cooling of a rotor for a rotary electric machine | Electricity | 62 | Expired |
| US6167952A | Cooling apparatus and method of assembling same | Emerging Cross-Sectional Technologies | 62 | Expired |
| US6681592B1 | Electrically driven aircraft cabin ventilation and environmental control system | Emerging Cross-Sectional Technologies | 60 | Expired |
| US6755892B2 | Carbon dioxide scrubber for fuel and gas emissions | Emerging Cross-Sectional Technologies | 56 | Expired |
| US6226597A | Method of maintaining components subject to fatigue failure | Physics | 53 | Expired |
| US7394175B2 | Integral motor and air bearing cooling path | Electricity | 53 | Expired |
| US6856045B1 | Power distribution assembly with redundant architecture | Electricity | 53 | Expired |
| US6142418A | Multi-path secondary power system for an aircraft | Emerging Cross-Sectional Technologies | 53 | Expired |
| US6422816B1 | Variable pitch propeller control system | Performing Operations; Transporting | 53 | Expired |
| US6651441B2 | Fluid flow system for a gas turbine engine | Emerging Cross-Sectional Technologies | 52 | Expired |
| US7342332B2 | Air bearing and motor cooling | Electricity | 51 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.