Inventor · disambiguated record
Douglas J. Littlejohn
Also filed as: LITTLEJOHN DOUGLAS J
9 granted patents·1,099 citations·filing 1987–1995
93Inventor score
Files withQUEST TECHNOLOGIES INC3BIOLOG INC2INT INTEGRATED SYSTEMS INC2NATCO CORP1POWER CONCEPTS INC1
Top patents by PatentIndex Score
9 records- 0195US4929426APortable blood chemistry measuring apparatusBIOLOG INC·Filed 1988·Granted May 29, 1990·271 cites·4 claims
- 0294US5123495AWheelchair stair climbing control systemQUEST TECHNOLOGIES INC·Filed 1989·Granted Jun 23, 1992·153 cites·15 claims
- 0393US5248007AElectronic control system for stair climbing vehicleQUEST TECHNOLOGIES INC·Filed 1990·Granted Sep 28, 1993·277 cites·12 claims
- 0492US5033000AVariable keyed power distribution and control system for motorized wheelchairNATCO CORP·Filed 1988·Granted Jul 16, 1991·110 cites·12 claims
- 0591US4940945AInterface circuit for use in a portable blood chemistry measuring apparatusBIOLOG INC·Filed 1987·Granted Jul 10, 1990·108 cites·5 claims
- 0684US5274311AControl system network structureQUEST TECHNOLOGIES INC·Filed 1991·Granted Dec 28, 1993·72 cites·3 claims
- 0774US5002397ASystem of fluid inspection and/or identificationINT INTEGRATED SYSTEMS INC·Filed 1989·Granted Mar 26, 1991·40 cites·52 claims
- 0865US5648708AForce actuated machine controllerPOWER CONCEPTS INC·Filed 1995·Granted Jul 15, 1997·38 cites·24 claims
- 0964US4998824ASystem of fluid inspection and/or identificationINT INTEGRATED SYSTEMS INC·Filed 1989·Granted Mar 12, 1991·30 cites·3 claims
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