David Charles Johnston

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Greensburg, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Round cutting insert with asymmetric chipbreaker feature
- Patent number 8,388,274
- Issue date Mar 5, 2013
- Kennametal Inc.
- Shi Chen
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
ROUND CUTTING INSERT WITH ASYMMETRIC CHIPBREAKER FEATURE
- Publication number 20110164934
- Publication date Jul 7, 2011
- Kennametal Inc.
- Shi Chen
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR