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David J. Dunn
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St. Thomas, CA
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Patents Grants
last 30 patents
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Patent Grant
Punch, apparatus and method for forming opposing holes in a hollow...
Patent number
7,484,397
Issue date
Feb 3, 2009
Vari-Form, Inc.
Jose U. Coelho
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
Punch, apparatus and method for forming opposing holes in a hollow...
Patent number
7,462,402
Issue date
Dec 9, 2008
Vari-Form Inc.
Jose U. Coelho
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Patents Applications
last 30 patents
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Patent Application
Punch, apparatus and method for forming opposing holes in a hollow...
Publication number
20070193323
Publication date
Aug 23, 2007
Vari-Form Inc.
Jose U. Coelho
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Application
Punch, apparatus and method for forming opposing holes in a hollow...
Publication number
20070157695
Publication date
Jul 12, 2007
Vari-Form Inc.
Jose U. Coelho
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...