U.S. patent number D647,540 [Application Number D/383,623] was granted by the patent office on 2011-10-25 for core barrel sleeve with axial grooves. This patent grant is currently assigned to Longyear TM, Inc.. Invention is credited to Christopher L. Drenth.
United States Patent | D647,540 |
Drenth | October 25, 2011 |
Inventors: | Drenth; Christopher L. (Draper, UT) |
---|---|
Assignee: | Longyear TM, Inc. (South
Jordan, UT) |
Appl. No.: | D/383,623 |
Filed: | January 20, 2011 |
Application Number | Filing Date | Patent Number | Issue Date | ||
---|---|---|---|---|---|
12968994 | Dec 15, 2010 | ||||
12968127 | Dec 14, 2010 | ||||
12898878 | Oct 6, 2010 | ||||
Current U.S. Class: | D15/21 |
Current International Class: | 1503 |
Field of Search: | ;D15/21,28 ;175/403,58,236,243,246,317,44,255,234,230,19,249,285,258,72,251,247,244 ;173/137 ;166/214,237,285,177.4,98 |
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