Individual holder
WILLIS DOUGLAS G
US·6 granted patents·4 pending applications·20 citations·filing 2005–2022
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
10 records- 0191US9844980B1Mobility device having walking wheel assembly for moving an object across non-planar areasWILLIS DOUGLAS G·Filed 2016·Granted Dec 19, 2017·9 cites·20 claims
- 0269US10137731B2Wheel padWILLIS DOUGLAS G·Filed 2011·Granted Nov 27, 2018·4 cites·16 claims
- 0368US9950564B2Articulating carriageWILLIS DOUGLAS G·Filed 2010·Granted Apr 24, 2018·4 cites·20 claims
- 0461US11679824B1Fluid-filled track wheel for improved movement of an object across a non-planar areaWILLIS DOUGLAS G·Filed 2019·Granted Jun 20, 2023·1 cites·8 claims
- 0560US9744807B2Wheel float with improved pivot jointsWILLIS DOUGLAS G·Filed 2012·Granted Aug 29, 2017·2 cites·20 claims
- 0652US11702123B1Braking and steering control apparatus for securing and moving an object on a surfaceWILLIS DOUGLAS G·Filed 2022·Granted Jul 18, 2023·0 cites·20 claims
- 0747US2007220704A1Articulated caster with pivot box jointWILLIS DOUGLAS G·Filed 2006·Application pending·0 cites
- 0847US2006196006A1Articulated casterWILLIS DOUGLAS G·Filed 2006·Application pending·0 cites
- 0947US2007039786A1Articulated castor braking systemWILLIS DOUGLAS G·Filed 2005·Application pending·0 cites
- 1039US2007221419A1Detachable drive unit for mobile carriageWILLIS DOUGLAS G·Filed 2006·Application pending·0 cites
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →