William H. Dell II

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Fort Loudon, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Foot valve assembly for a down hole drill
- Patent number 8,561,730
- Issue date Oct 22, 2013
- Atlas Copco Secoroc LLC
- Jing James Yao
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...