Douglas C. Ruhmann

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Brentwood, MO, US

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Patents Grantslast 30 patents

Information Patent Grant
Filament wound railway hopper car
- Patent number 4,608,931
- Issue date Sep 2, 1986
- ACF Industries, Incorporated
- Douglas C. Ruhmann
- B61 - RAILWAYS
Information Patent Grant
Transverse bulkhead connection to filament wound vehicle body sides
- Patent number 4,497,258
- Issue date Feb 5, 1985
- ACF Industries, Incorporated
- Douglas C. Ruhmann
- B61 - RAILWAYS