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Patent applications and USPTO patent grants for Shafer; Homer J..The latest application filed is for "safety shut-off for pump".
Patent | Date |
---|---|
Safety shut-off for pump Grant 3,911,678 - Shafer , et al. October 14, 1 | 1975-10-14 |
Trunnion Type Rotary Valve Of Welded Tube And Plate Construction Grant 3,792,835 - Shafer February 19, 1 | 1974-02-19 |
Piston Operator For Imparting Rotary Motion Grant 3,709,106 - Shafer January 9, 1 | 1973-01-09 |
Method Of Making Welded Ball Valve Grant 3,678,556 - Shafer July 25, 1 | 1972-07-25 |
Lubricant Seal For Rotary Valve Grant 3,580,268 - Shafer May 25, 1 | 1971-05-25 |
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