Douglas J. Littlejohn

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Sunnyvale, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Control system network structure
- Patent number 5,274,311
- Issue date Dec 28, 1993
- Quest Technologies, Inc.
- Douglas J. Littlejohn
- G05 - CONTROLLING REGULATING
Information Patent Grant
Electronic control system for stair climbing vehicle
- Patent number 5,248,007
- Issue date Sep 28, 1993
- Quest Technologies, Inc.
- Baxter R. Watkins
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Wheelchair stair climbing control system
- Patent number 5,123,495
- Issue date Jun 23, 1992
- Quest Technologies, Inc.
- Douglas J. Littlejohn
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Variable keyed power distribution and control system for motorized...
- Patent number 5,033,000
- Issue date Jul 16, 1991
- Natco Corporation
- Douglas J. Littlejohn
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Interface circuit for use in a portable blood chemistry measuring a...
- Patent number 4,940,945
- Issue date Jul 10, 1990
- Biologix Inc.
- Douglas J. Littlejohn
- G01 - MEASURING TESTING
Information Patent Grant
Portable blood chemistry measuring apparatus
- Patent number 4,929,426
- Issue date May 29, 1990
- Biologix, Inc.
- Balazs I. Bodai
- G01 - MEASURING TESTING