Richard L. Gravenhorst

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River Ridge, LA

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Patents Grantslast 30 patents

Information Patent Grant
"True free fall" hydraulic winch system for converting a "backhoe"...
- Patent number 4,950,125
- Issue date Aug 21, 1990
- Reco Crane Company, Inc.
- Richard L. Gravenhorst
- B66 - HOISTING LIFTING HAULING