Marion R. Bontrager

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Phoenix, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for making cellulose insulation
- Patent number 4,191,224
- Issue date Mar 4, 1980
- Diamond Insulation Industries, Inc.
- Kenneth L. Bontrager
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES