William A. Welsh
42Patents
13h-index
46Co-inventors
81Inventor score
Filing activity: Apr 16, 1992 → Oct 17, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5310137A | Helicopter active noise control system | Emerging Cross-Sectional Technologies | 67 | Expired |
| US7648338B1 | Dual higher harmonic control (HHC) for a counter-rotating, coaxial rotor system | Emerging Cross-Sectional Technologies | 36 | Active |
| US6644590B2 | Active system and method for vibration and noise reduction | Performing Operations; Transporting | 35 | Expired |
| US6354536B1 | Rotor hub mounted actuator for controlling a blade on a rotorcraft | Emerging Cross-Sectional Technologies | 35 | Expired |
| US6416016B1 | Actuator for an active transmission mount isolation system | Performing Operations; Transporting | 25 | Expired |
| US6769872B2 | Active control of multi-element rotor blade airfoils | Emerging Cross-Sectional Technologies | 24 | Expired |
| US6138947A | Active noise control system for a defined volume | Physics | 21 | Expired |
| US7118328B2 | Gearbox mounted force generator | Performing Operations; Transporting | 20 | Expired |
| US8920125B2 | Dual frequency hub mounted vibration suppressor system | Emerging Cross-Sectional Technologies | 18 | Active |
| US8021115B2 | Active force generation system for minimizing vibration in a rotating system | Emerging Cross-Sectional Technologies | 16 | Active |
| US6869375B2 | High output force actuator for an active vibration control system | Emerging Cross-Sectional Technologies | 14 | Expired |
| US7003380B2 | System for computationally efficient adaptation of active control of sound or vibration | Performing Operations; Transporting | 14 | Expired |
| US9046148B2 | Active force generation system for minimizing vibration in a rotating system | Emerging Cross-Sectional Technologies | 14 | Active |
| US7224807B2 | System for computationally efficient active control of tonal sound or vibration | Physics | 11 | Expired |
| US6832973B1 | System for active noise reduction | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6105900A | Active noise control system for a helicopter gearbox mount | Performing Operations; Transporting | 9 | Expired |
| US6666648B2 | Directional elastomeric coupler | Emerging Cross-Sectional Technologies | 9 | Expired |
| US8403643B2 | Dual frequency hub mounted vibration suppressor system | Emerging Cross-Sectional Technologies | 7 | Active |
| US10906636B2 | Vibration control assembly for an aircraft and method of controlling aircraft vibration | Mechanical Engineering; Lighting; Heating | 7 | Active |
| US8038394B2 | System and method of damping a 1P motion | Emerging Cross-Sectional Technologies | 5 | Active |
| US8454315B2 | Active force generation system for minimizing vibration in a rotating system | Emerging Cross-Sectional Technologies | 4 | Active |
| US8042659B1 | Active force generation/isolation system employing Magneto Rheological Fluid (MRF) | Emerging Cross-Sectional Technologies | 4 | Active |
| US9190071B2 | Noise suppression device, system, and method | Physics | 2 | Active |
| US9452831B2 | Integration of rotary electrical actuator for swashplateless individual blade control | Emerging Cross-Sectional Technologies | 2 | Active |
| US11235868B2 | Vibration control assembly for an aircraft and method of controlling aircraft vibration | Mechanical Engineering; Lighting; Heating | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.