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Inventor

David L. Christensen

Inventor
Glendale, CA, US

Overview

17→
Patents
2004–2020
Patent span
Physics
Primary field (CPC G)

Patents· 17 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G06Fprimary
G06FElectric digital data processing13%
B25JManipulators7%
A63BApparatus for physical training, gymnastics, swimming, climbing, or fencing6%
A63GMerry-go-rounds4%
A63HToys, e.g. tops, dolls, hoops or building blocks4%
C09JAdhesives4%
E04BGeneral building constructions4%
E04FFinishing work on buildings, e.g. stairs, floors4%
G01NInvestigating or analysing materials by determining their chemical or physical properties4%
G01VGeophysics4%
PatentTitleYear
10,807,244Ballistic robot system with spin and other controlled motion of robot during flight202010,732,197System for stabilizing an object to control tipping during omnidirectional movement202010,722,807Haptic floor system with quake plate assemblies producing large vibration effects202010,723,455Aerial show system with dynamic participation of unmanned aerial vehicles (UAVs) with distributed show systems202010,647,004Air-bladder enhanced with gecko-adhesive for grasping applications202010,456,694Haptic floor system with quake plate assemblies producing large vibration effects201910,437,359Stylus with external magnetic influence201910,416,754Floor system providing omnidirectional movement of a person walking in a virtual reality environment201910,316,220Controllable adhesive on conformable film for non-flat surfaces201910,296,093Altering feedback at an electronic device based on environmental and device conditions201910,092,850Robotic bouncing ball201810,011,010Dry adhesives for enhancing ground reaction forces substantially beyond friction20189,965,930Electronic device including piezoelectric material layer and temperature compensation circuitry and related methods20189,631,684'Velocity-dependent mechanical and magnetic clutch'20179,174,804'Conveyor hood assembly'20156,946,300'Multi-modal detection of explosives, narcotics, and other chemical substances'20056,797,944'Laser desorption and detection of explosives, narcotics, and other chemical substances'2004

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2004–2005Patents assigned to CONTROL SCREENING LLC (2)· patent assignee history
2004–2005Based in Kingston, CA· patent location history
2015Patents assigned to CHRISTENSEN DAVID L (1)· patent assignee history
2017–2020Patents assigned to UNIV LELAND STANFORD JUNIOR (4)· patent assignee history
2018–2020Patents assigned to DISNEY ENTPR INC (7)· patent assignee history
2018–2019Patents assigned to APPLE INC (3)· patent assignee history
2018–2020Based in Glendale, CA, US· patent location history
2018–2019Based in Los Altos, CA, US· patent location history
2018–2019Based in Los Altos Hills, CA, US· patent location history
2020Based in Burbank, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DISNEY ENTPR INC72018–2020
UNIV LELAND STANFORD JUNIOR42017–2020
APPLE INC32018–2019
CONTROL SCREENING LLC22004–2005
CHRISTENSEN DAVID Lself12015
Locations
LocationPatentsSpan
Glendale, California, US72018–2020
Los Altos, California, US22018–2019
Los Altos Hills, California, US22018–2019
Kingston, CA22004–2005
Burbank, California, US12020