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Patent applications and USPTO patent grants for Johnston; David J..The latest application filed is for "system and method for applying an additive to a material stream".
Patent | Date |
---|---|
System and method for applying an additive to a material stream Grant 7,441,942 - McNeff , et al. October 28, 2 | 2008-10-28 |
System and Method for Applying an Additive To A Material Stream App 20070211564 - McNeff; Larry C. ;   et al. | 2007-09-13 |
System and method for applying an additive to a material stream App 20040228207 - McNeff, Larry C. ;   et al. | 2004-11-18 |
Retractable stairway assembly for a vehicle Grant 6,264,222 - Johnston , et al. July 24, 2 | 2001-07-24 |
Method of controlling a retractable stairway assembly Grant 6,178,364 - Delurey , et al. January 23, 2 | 2001-01-23 |
Device for providing tactile indication of pedal position Grant 5,774,042 - Johnston June 30, 1 | 1998-06-30 |
Pulse width modulated solenoid driver controller Grant 5,621,603 - Adamec , et al. April 15, 1 | 1997-04-15 |
High pressure valve Grant 4,114,851 - Shivak , et al. September 19, 1 | 1978-09-19 |
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