Assignee
HARTFIELD JR ROY J
2 granted patents·1 pending application·2 citations·filing 2008–2013
Top patents by PatentIndex Score
3 records- 0164US8567178B2Positive displacement rotary vane engineHARTFIELD JR ROY J·Filed 2011·Granted Oct 29, 2013·1 cites·15 claims
- 0252US2014020384A1Positive displacement rotary vane engineHARTFIELD JR ROY J·Filed 2013·Application pending·0 cites
- 0343US8037863B2Positive displacement rotary vane engineHARTFIELD JR ROY J·Filed 2008·Granted Oct 18, 2011·1 cites·18 claims
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