David J. Roldness

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San Diego, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Car end foldable doors locking device
- Patent number 4,324,189
- Issue date Apr 13, 1982
- Pullman Incorporated
- David J. Roldness
- B61 - RAILWAYS
Information Patent Grant
Locking mechanism for B deck of auto-rack railway car
- Patent number 4,318,649
- Issue date Mar 9, 1982
- Pullman Incorporated
- David J. Roldness
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Auto carrier railway car
- Patent number 4,287,833
- Issue date Sep 8, 1981
- Pullman Incorporated
- David J. Roldness
- B61 - RAILWAYS
Information Patent Grant
Railway car counter balanced tilting deck
- Patent number 4,248,557
- Issue date Feb 3, 1981
- Pullman Incorporated
- David J. Roldness
- B60 - VEHICLES IN GENERAL