John Carey Ratcliff

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Missouri City, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for full penetration electron beam weld for downhold tools
- Patent number 5,977,509
- Issue date Nov 2, 1999
- Schlumberger Technology Corporation
- John Carey Ratcliff
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR