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Richard L. Gravenhorst — 2 Patents

Thakhek, LA: #1 of 1 inventorsTop 100%
Overall (All Time): #2,318,875 of 4,157,543Top 60%
2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5048172 "Method for converting a ""backhoe"" to a ""crane"" using a ""true free fall"" hydraulic winch system" — 1991-09-17
4950125 """True free fall"" hydraulic winch system for converting a ""backhoe"" to a ""crane""" — 1990-08-21

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