Number | Name | Date | Kind |
---|---|---|---|
2306683 | Zublin | Dec 1942 | A |
3326307 | Rudy | Jun 1967 | A |
3679009 | Goodfellow | Jul 1972 | A |
3982595 | Ott | Sep 1976 | A |
4040493 | Saxman | Aug 1977 | A |
4274496 | Liljekvisit et al. | Jun 1981 | A |
4298080 | Hignett | Nov 1981 | A |
4316515 | Pessier | Feb 1982 | A |
4441566 | Pessier et al. | Apr 1984 | A |
RE34167 | Mattsson et al. | Jan 1993 | E |
5234064 | Lenaburg | Aug 1993 | A |
5253723 | Narvestad | Oct 1993 | A |
5429201 | Saxman | Jul 1995 | A |
5487435 | Crawley et al. | Jan 1996 | A |
5598895 | Anderson et al. | Feb 1997 | A |
5785135 | Crawley | Jul 1998 | A |
Entry |
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Brochure for “Raise Boring”, by Baker Hughes Mining Tools, Inc. (undated). |
Brochure for “The Shark” by Baker Hughes Mining Tools, Inc. (undated). |