Frank Zelenka

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Rexdale, CA

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Patents Grantslast 30 patents

Information Patent Grant
Inclined cutter for surface cleaning head
- Patent number 4,725,097
- Issue date Feb 16, 1988
- Bartell Industries Limited
- Frank Zelenka
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Brake system for cutters of surface cleaning cutter cage
- Patent number 4,640,553
- Issue date Feb 3, 1987
- Bartell Industries Ltd.
- Frank Zelenka
- B28 - WORKING CEMENT, CLAY, OR STONE