U.S. patent number D674,422 [Application Number D/376,995] was granted by the patent office on 2013-01-15 for drill bit with a pointed cutting element and a shearing cutting element. The grantee listed for this patent is Ronald B. Crockett, David R. Hall, Francis Leany, Marcus Skeem, Casey Webb. Invention is credited to Ronald B. Crockett, David R. Hall, Francis Leany, Marcus Skeem, Casey Webb.
United States Patent | D674,422 |
Hall , et al. | January 15, 2013 |
Inventors: | Hall; David R. (Provo, UT), Leany; Francis (Salem, UT), Crockett; Ronald B. (Payson, UT), Webb; Casey (Provo, UT), Skeem; Marcus (Provo, UT) | ||||||||||
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Applicant: |
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Appl. No.: | D/376,995 | ||||||||||
Filed: | October 15, 2010 |
Application Number | Filing Date | Patent Number | Issue Date | ||
---|---|---|---|---|---|
12766555 | Apr 23, 2010 | ||||
12752323 | Apr 1, 2010 | ||||
29376990 | Oct 15, 2010 | ||||
12619305 | Nov 16, 2009 | ||||
11766975 | Jun 22, 2007 | 8122980 | |||
29376995 | |||||
11673634 | Feb 12, 2007 | 8109349 | |||
Current U.S. Class: | D15/139; D15/131 |
Current International Class: | 1509 |
Field of Search: | ;D15/131,132,138,139,140 ;175/378,393,415,417,418,420.1,429,430 ;177/379,385,393,418,420.1,421,427,429,430,431,432 ;299/29,79.1 |
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