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Patent applications and USPTO patent grants for Macrae; Jon.The latest application filed is for "apparatus and system to allow tool passage ahead of a bit".
Patent | Date |
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Apparatus and system to allow tool passage ahead of a bit Grant 8,646,548 - Wells , et al. February 11, 2 | 2014-02-11 |
Apparatus and System to Allow Tool Passage Ahead of a Bit App 20110011579 - Wells; Peter ;   et al. | 2011-01-20 |
Apparatus and system to allow tool passage ahead of a bit Grant 7,841,400 - Wells , et al. November 30, 2 | 2010-11-30 |
Apparatus And System To Allow Tool Passage Ahead Of A Bit App 20100059290 - Wells; Peter ;   et al. | 2010-03-11 |
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