Edward V. Fritsch

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Palestine, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Shock absorbing bit retaining ring
- Patent number 4,924,948
- Issue date May 15, 1990
- Sandvik Rock Tools, Inc.
- Jo-Yu Chuang
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS