David F. Barr

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Blue Earth, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Fan mount for grain drying and storage bin
- Patent number 4,306,490
- Issue date Dec 22, 1981
- Continental Agri-Services, Inc.
- Daniel R. Kallestad
- F26 - DRYING
Information Patent Grant
Floor support for grain drying and storage bin
- Patent number 4,281,489
- Issue date Aug 4, 1981
- Continental Agri-Services, Inc.
- Daniel R. Kallestad
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL