P

Inventor

LITTLEJOHN DOUGLAS J

US9 patents
⚠️ This page may combine multiple inventors who share the name “LITTLEJOHN DOUGLAS J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

QUEST TECHNOLOGIES INC

3 patents
US5123495AJun 23, 1992

Wheelchair stair climbing control system

QUEST TECHNOLOGIES INC153 citations96
US5248007ASep 28, 1993

Electronic control system for stair climbing vehicle

QUEST TECHNOLOGIES INC277 citations95
US5274311ADec 28, 1993

Control system network structure

QUEST TECHNOLOGIES INC72 citations90

BIOLOG INC

2 patents
US4940945AJul 10, 1990

Interface circuit for use in a portable blood chemistry measuring apparatus

BIOLOG INC108 citations94
US4929426AMay 29, 1990

Portable blood chemistry measuring apparatus

BIOLOG INC271 citations94

INT INTEGRATED SYSTEMS INC

2 patents
US5002397AMar 26, 1991

System of fluid inspection and/or identification

INT INTEGRATED SYSTEMS INC40 citations88
US4998824AMar 12, 1991

System of fluid inspection and/or identification

INT INTEGRATED SYSTEMS INC30 citations86

NATCO CORP

1 patent
US5033000AJul 16, 1991

Variable keyed power distribution and control system for motorized wheelchair

NATCO CORP110 citations91

POWER CONCEPTS INC

1 patent
US5648708AJul 15, 1997

Force actuated machine controller

POWER CONCEPTS INC38 citations89