4 Square Motors

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McDonald, KS, US

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Patents Grantslast 30 patents

Information Patent Grant
Rotary hydraulic engine having oppositely disposed pistons in a sco...
- Patent number 4,598,628
- Issue date Jul 8, 1986
- 4 Square Motors
- Harold D. Courtright
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS