John B. Cheung

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Bellevue, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Fluid jet drilling nozzle and method
- Patent number 4,306,627
- Issue date Dec 22, 1981
- Flow Industries, Inc.
- John B. Cheung
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus to remove structural concrete
- Patent number 4,081,200
- Issue date Mar 28, 1978
- Flow Industries, Inc.
- John B. Cheung
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES