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Patent applications and USPTO patent grants for Bender; Emil A..The latest application filed is for "counterbalanced pumps".
Patent | Date |
---|---|
Counterbalanced pumps Grant 4,651,582 - Bender March 24, 1 | 1987-03-24 |
Reciprocating drive and reversing mechanism for long stroke, well pumping unit Grant 4,391,155 - Bender July 5, 1 | 1983-07-05 |
Positive engagement fail safe mechanism and lift belt construction for long stroke, well pumping unit Grant 4,388,837 - Bender June 21, 1 | 1983-06-21 |
Tandem long stroke reciprocating mud pump assembly Grant 4,242,057 - Bender December 30, 1 | 1980-12-30 |
Well rig Grant 3,986,564 - Bender October 19, 1 | 1976-10-19 |
Simplified Well Rig Grant 3,792,836 - Bender February 19, 1 | 1974-02-19 |
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