Bob L. Caldwell

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Big Sandy, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for pelletizing a sulphur-bentonite clay mixture and the pr...
- Patent number 4,133,669
- Issue date Jan 9, 1979
- Agri-Prassco Joint Venture
- Bob L. Caldwell
- C05 - FERTILISERS MANUFACTURE THEREOF