Number | Name | Date | Kind |
---|---|---|---|
1025735 | Bosredon | May 1912 | |
1835701 | Edmunds | Dec 1931 | |
1859717 | Rutrle | May 1932 | |
1882268 | Appleman | Oct 1932 | |
2072470 | Thompson | Mar 1937 | |
2998088 | Pennington | Aug 1961 | |
3239275 | Belugou | Mar 1966 | |
3882749 | Tourek | May 1975 | |
4108260 | Bozarth | Aug 1978 | |
4199035 | Thompson | Apr 1980 | |
4244432 | Rowley et al. | Jan 1981 | |
4334585 | Upton | Jun 1982 | |
4350215 | Radtke | Sep 1982 |
Number | Date | Country |
---|---|---|
1228941 | Jul 1963 | FRX |
330433 | Jun 1930 | GBX |
2022476 | Dec 1979 | GBX |
2086451 | May 1982 | GBX |
2095724 | Oct 1982 | GBX |
Entry |
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J. D. Barr, Optimisation of Radial Distribution of Stratapax Cutter in Rock Drilling Bits, Feb. 1, 1980, see FIG. 5. |
1980-1981 Composite Catalog, p. 5169. |
David Hall, Megadiamond Announces a Unique Service, Oct. 6, 1981. |
Cover of Drilling Magazine, Jan. 1983. |
1938 Composite Catalog, p. 961. |
1938 Composite Catalog, B. K. Appleman of Beaumont, Texas. |
1939 Composite Catalog, p. 366. |
Excerpt from J. E. Brantley, History of Oil Well Drilling, Gulf Publishing Co., Houston, Texas. |