David A. Field

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Birmingham, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Variable curvature tube and draw die therefor
- Patent number 7,475,706
- Issue date Jan 13, 2009
- GM Global Technology Operations, Inc.
- David A. Field
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Variable curvature tube and draw die therefor
- Patent number 7,290,421
- Issue date Nov 6, 2007
- General Motors Corporation
- David A. Field
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Apparatus and method for the noncircular bending of tubes
- Patent number 7,251,976
- Issue date Aug 7, 2007
- GM Global Technology Operations, Inc.
- David A. Field
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

Information Patent Application
Variable curvature tube and draw die therefor
- Publication number 20070227224
- Publication date Oct 4, 2007
- GENERAL MOTORS CORPORATION
- David A. Field
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Apparatus and method for the noncircular bending of tubes
- Publication number 20050145002
- Publication date Jul 7, 2005
- David A. Field
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Variable curvature tube and draw die therefor
- Publication number 20050000261
- Publication date Jan 6, 2005
- David A. Field
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...