Littlejohn; Douglas J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Littlejohn; Douglas J..The latest application filed is for "force actuated machine controller".
- Littlejohn; Douglas J. - Squaw Valley CA
- Littlejohn; Douglas J. - Sunnyvale CA
- Littlejohn; Douglas J. - Santa Clara CA
| Patent | Date |
|---|---|
| Force actuated machine controller Grant 5,648,708 - Littlejohn July 15, 1 | 1997-07-15 |
| Control system network structure Grant 5,274,311 - Littlejohn , et al. December 28, 1 | 1993-12-28 |
| Electronic control system for stair climbing vehicle Grant 5,248,007 - Watkins , et al. September 28, 1 | 1993-09-28 |
| Wheelchair stair climbing control system Grant 5,123,495 - Littlejohn , et al. June 23, 1 | 1992-06-23 |
| Variable keyed power distribution and control system for motorized wheelchair Grant 5,033,000 - Littlejohn , et al. July 16, 1 | 1991-07-16 |
| System of fluid inspection and/or identification Grant 5,002,397 - Ingrum , et al. March 26, 1 | 1991-03-26 |
| System of fluid inspection and/or identification Grant 4,998,824 - Littlejohn , et al. March 12, 1 | 1991-03-12 |
| Interface circuit for use in a portable blood chemistry measuring apparatus Grant 4,940,945 - Littlejohn , et al. July 10, 1 | 1990-07-10 |
| Portable blood chemistry measuring apparatus Grant 4,929,426 - Bodai , et al. May 29, 1 | 1990-05-29 |
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