Kauffman; Theresa M.

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Patents Grantslast 30 patents

Information Patent Grant
Method of making multi-walled pipes and storage tanks for toxic and...
- Patent number 5,308,423
- Issue date May 3, 1994
- Kauffman; Theresa M.
- Donn Kauffman
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Multi-walled pipes and storage tanks for toxic and corrosive fluids
- Patent number 5,232,119
- Issue date Aug 3, 1993
- Kauffman; Theresa M.
- Donn K. Kauffman
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Multi-walled pipes and storage tanks for toxic and corrosive fluids
- Patent number 5,143,244
- Issue date Sep 1, 1992
- Kauffman; Theresa M.
- Donn Kauffman
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL

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