Fayfield; Robert W.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Fayfield; Robert W..The latest application filed is for "micro-processor controlled indicator device".
- Fayfield; Robert W. - Excelsior MN
- Fayfield; Robert W. - Minneapolis MN
- Fayfield; Robert W. - Shorewood MN
| Patent | Date |
|---|---|
| Micro-processor controlled indicator device Grant 7,492,276 - Fayfield February 17, 2 | 2009-02-17 |
| Micro-processor controlled indicator device App 20070152842 - Fayfield; Robert W. | 2007-07-05 |
| Retro-reflective photoelectric sensor Grant 6,946,643 - Fayfield September 20, 2 | 2005-09-20 |
| Extranet security system and method App 20040050929 - Fayfield, Robert W. | 2004-03-18 |
| Housing for photoelectric control Grant D471,162 - Fayfield March 4, 2 | 2003-03-04 |
| Housing for photoelectric control Grant D470,462 - Fayfield , et al. February 18, 2 | 2003-02-18 |
| Housing for photoelectric control Grant D442,563 - Fayfield May 22, 2 | 2001-05-22 |
| Dual mode binary sensor for bus operation Grant 5,644,730 - Fayfield July 1, 1 | 1997-07-01 |
| Photoelectric sensor assembly having compressible and sealing members Grant 5,198,664 - Fayfield March 30, 1 | 1993-03-30 |
| Sourcing or sinking output circuit Grant 4,982,107 - Fayfield January 1, 1 | 1991-01-01 |
| Level indicator with alarm Grant 4,965,548 - Fayfield October 23, 1 | 1990-10-23 |
| Automatic power control for modulated LED photoelectric devices Grant 4,598,198 - Fayfield July 1, 1 | 1986-07-01 |
| Valve position monitor and control system Grant 4,376,450 - Fayfield , et al. March 15, 1 | 1983-03-15 |
| Alignment indicator for photoelectric scanners Grant 4,356,393 - Fayfield October 26, 1 | 1982-10-26 |
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