David A. Schuff

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Phoenix, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for metering and mixing aggregate and cement
- Patent number 5,785,420
- Issue date Jul 28, 1998
- David A. Schuff
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Apparatus for metering and mixing aggregate and cement
- Patent number 5,624,183
- Issue date Apr 29, 1997
- David A. Schuff
- B28 - WORKING CEMENT, CLAY, OR STONE