Number | Name | Date | Kind |
---|---|---|---|
1785419 | Moss | Dec 1930 | |
2457277 | Schlumberger | Dec 1948 | |
2482913 | Jobe | Sep 1949 | |
3301337 | Vaughn et al. | Jan 1967 | |
4497351 | Garcia | Feb 1985 | |
4640362 | Schellstede | Feb 1987 | |
4765173 | Schellstede | Aug 1988 | |
4928757 | Schellstede | May 1990 | |
5183111 | Schellstede | Feb 1993 |
Entry |
---|
Baker Oil Tools Technical Manual; Control Pressure Penetrator; Feb. 4, 1994; pp. 1-6. |
Kinley StadardPerforator/Senior Perforator catalog sheet; publication date unknown, but more than one year prior to filing date; p. 2199. |
Penetrators, Inc. Tech Report; Lance Formation Penetrator Tool; Sep. 18, 1988; one page. |