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Patent applications and USPTO patent grants for Robertson; Joseph D..The latest application filed is for "dryer hopper".
Patent | Date |
---|---|
Dryer hopper Grant 9,494,364 - Robertson , et al. November 15, 2 | 2016-11-15 |
Dryer Hopper App 20150247670 - Robertson; Joseph D. ;   et al. | 2015-09-03 |
System for spin-cleaning closed-end filter cartridges Grant 6,739,347 - Dudley , et al. May 25, 2 | 2004-05-25 |
System for spin-cleaning closed-end filter cartridges App 20030037808 - Dudley, David Edmond ;   et al. | 2003-02-27 |
Spinner for cleaning cartridge-type water filters Grant 5,989,419 - Dudley , et al. November 23, 1 | 1999-11-23 |
Scrap recovery and feed system Grant 4,014,462 - Robertson * March 29, 1 | 1977-03-29 |
Scrap Recovery And Feed System Grant 3,797,702 - Robertson March 19, 1 | 1974-03-19 |
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