John M. Lehmann

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Forest, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Plasma arc keyhole welding stability and quality through titanium n...
- Patent number 6,495,790
- Issue date Dec 17, 2002
- McDermott Technology, Inc.
- John M. Lehmann
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method and device for reducing overpenetration at the start of plas...
- Patent number 6,037,561
- Issue date Mar 14, 2000
- The United States of America as represented by the United States Department o...
- John M. Sanders
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method and device for reducing overpenetration at the start of plas...
- Patent number 5,773,786
- Issue date Jun 30, 1998
- McDermott Technology, Inc.
- John M. Sanders
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
Plasma arc keyhole welding stability and quality through titanium n...
- Publication number 20020170888
- Publication date Nov 21, 2002
- McDERMOTT TECHNOLOGY, INC.
- John M. Lehmann
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR