| 7492276 |
Micro-processor controlled indicator device |
— |
2009-02-17 |
| 6946643 |
Retro-reflective photoelectric sensor |
— |
2005-09-20 |
| D471162 |
Housing for photoelectric control |
— |
2003-03-04 |
| D470462 |
Housing for photoelectric control |
Dennis Smith |
2003-02-18 |
| 6285021 |
Self checking safety switch |
— |
2001-09-04 |
| D442563 |
Housing for photoelectric control |
— |
2001-05-22 |
| D412316 |
Housing for photoelectric control |
— |
1999-07-27 |
| 5777557 |
Binary sensor with diagnostic signal superimposed on binary output |
— |
1998-07-07 |
| 5644730 |
Dual mode binary sensor for bus operation |
— |
1997-07-01 |
| D361057 |
Housing for photoelectric control |
— |
1995-08-08 |
| 5254846 |
Analog photosensor operating on the power from a standard 4-20 ma instrumentation current loop |
— |
1993-10-19 |
| 5198664 |
Photoelectric sensor assembly having compressible and sealing members |
— |
1993-03-30 |
| 5087838 |
Sourcing or sinking output circuit |
— |
1992-02-11 |
| 4982107 |
Sourcing or sinking output circuit |
— |
1991-01-01 |
| 4965548 |
Level indicator with alarm |
— |
1990-10-23 |
| 4626053 |
Sensing devices with modular interconnection and programming |
— |
1986-12-02 |
| 4598198 |
Automatic power control for modulated LED photoelectric devices |
— |
1986-07-01 |
| 4376450 |
Valve position monitor and control system |
Kenneth B. Fontaine |
1983-03-15 |
| 4369401 |
Valve position monitor and control system |
Kenneth B. Fontaine |
1983-01-18 |
| 4356393 |
Alignment indicator for photoelectric scanners |
— |
1982-10-26 |
| 4217492 |
Modular photoelectric switch |
— |
1980-08-12 |