Diane M. Witkonis

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Lancaster, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for removing foreign materials from a cement m...
- Patent number 4,479,591
- Issue date Oct 30, 1984
- Barber-Greene Company
- George M. Burkhart
- B28 - WORKING CEMENT, CLAY, OR STONE