Number | Date | Country | Kind |
---|---|---|---|
9717505 | Aug 1997 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
4246977 | Allen | Jan 1981 | |
4714120 | King | Dec 1987 | |
4830123 | Daly et al. | May 1989 | |
4889017 | Fuller et al. | Dec 1989 | |
4907662 | Deane et al. | Mar 1990 | |
5238075 | Keith et al. | Aug 1993 | |
5361859 | Tibbitts | Nov 1994 | |
5582261 | Keith et al. | Dec 1996 | |
5699868 | Caraway et al. | Dec 1997 | |
5816346 | Beaton | Oct 1998 | |
5829539 | Newton et al. | Nov 1998 | |
5888619 | Griffin | Mar 1999 |
Entry |
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1998 Hughes Tool Company Brochure--Hughes Blue Chip Bits--B15M Polycrystalline Diamond Bit. |
1998 Hughes Tool Company Brochure--Hughes Blue Chip Bits--B17M Polycrystalline Diamond Bit. |
1998 Hughes Tool Company Brochure--Hughes Blue Chip Bits--B33M Polycrystalline Diamond Bit. |
1998 Hughes Tool Company Brochure--Hughes Blue Chip Bits--B35M Polycrystalline Diamond Bit. |