Inventor · Apex, NC, US

Douglas Swanson

20Patents
7h-index
36Co-inventors
69Inventor score

Filing activity: Apr 8, 1993 → Apr 8, 2022

Most-cited inventions

PatentTitleAreaCited byStatus
US5526292A Broadband noise and vibration reduction Physics 63 Expired
US5427347A Apparatus for controlling active mounts Mechanical Engineering; Lighting; Heating 41 Expired
US5754662A Frequency-focused actuators for active vibrational energy control systems Physics 34 Expired
US5947457A Fluid-filled active vibration absorber Mechanical Engineering; Lighting; Heating 31 Expired
US6695294B2 Controlled equilibrium device with displacement dependent spring rates and integral damping Performing Operations; Transporting 29 Expired
US9073627B2 Helicopter vibration control system and circular force generation systems for canceling vibrations Emerging Cross-Sectional Technologies 24 Active
US8162606B2 Helicopter hub mounted vibration control and circular force generation systems for canceling vibrations Emerging Cross-Sectional Technologies 17 Active
US7571876B2 Aircraft landing gear assembly shimmy damper Mechanical Engineering; Lighting; Heating 6 Active
US7686246B2 Method and system for controlling helicopter vibrations Performing Operations; Transporting 5 Active
US10486803B2 Systems and methods for structural health monitoring and protection Performing Operations; Transporting 4 Active
US8272592B2 Method and system for controlling helicopter vibrations Performing Operations; Transporting 3 Active
US10543911B2 Rotary wing aircraft vibration control system with resonant inertial actuators Performing Operations; Transporting 1 Active
US8534600B2 Aircraft landing gear assembly shimmy damper Mechanical Engineering; Lighting; Heating 1 Active
US12345587B2 Hanger bearing mounted torque sensor Physics 0 Active
US10393216B2 Redundant active vibration and noise control systems and methods Performing Operations; Transporting 0 Active
US12054261B2 Active vibration control of floor and seat frame vibration Mechanical Engineering; Lighting; Heating 0 Active
US12025013B2 Rotating machine component clearance sensing systems and methods Mechanical Engineering; Lighting; Heating 0 Active
US11205982B2 Actuator motion controller with regeneration compensation Emerging Cross-Sectional Technologies 0 Active
US10392102B2 Helicopter vibration control system and circular force generation systems for canceling vibrations Emerging Cross-Sectional Technologies 0 Active
US11745861B2 Active vibration control system in a gunfire vibration environment Performing Operations; Transporting 0 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.