D. J. Rapp

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Dubuque, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for fixing blast/cleaning waste
- Patent number 5,439,527
- Issue date Aug 8, 1995
- The TDJ Group, Inc.
- D. J. Rapp
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method for fixing blast/cleaning waste
- Patent number 5,266,122
- Issue date Nov 30, 1993
- The TDJ Group, Inc.
- D. J. Rapp
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method of treating metallic oxide impregnated dust
- Patent number 4,878,944
- Issue date Nov 7, 1989
- The TDJ Group, Inc.
- Thomas E. Rolle
- C21 - METALLURGY OF IRON