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DRILLING APPARATUS WITH REDUCED EXPOSURE OF CUTTERS AND METHODS OF DRILLING

13/248,895 | U.S. Patent Application

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Location ELECTRONIC
Filed Sept. 29, 2011
Examiner DANIEL P STEPHENSON
Class 175
Art Group 3676
Patent No. 8,172,008
Case Type Utility - 175/057000
Status Patented Case
Parent 12/906,713 Patented
Parent 11/507,279 Patented
Parent 11/214,524 Patented
Parent 10/861,129 Patented
Parent 10/266,534 Patented
Parent 09/738,687 Patented
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Last Updated: 5 years, 6 months ago
Date # Transaction