Assignee
HIGHLAND PUMP EVI CO INC
US·3 granted patents·92 citations·filing 1991–1992
Top patents by PatentIndex Score
3 records- 0164US5246076AMethods and apparatus for controlling long-stroke pumping units using a variable-speed driveHIGHLAND PUMP EVI CO INC·Filed 1992·Granted Sep 21, 1993·41 cites·19 claims
- 0260US5224834APump-off control by integrating a portion of the area of a dynagraphHIGHLAND PUMP EVI CO INC·Filed 1991·Granted Jul 6, 1993·39 cites·24 claims
- 0346US5309992APulley-drive lifting systemHIGHLAND PUMP EVI CO INC·Filed 1991·Granted May 10, 1994·12 cites·11 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →