Number | Name | Date | Kind |
---|---|---|---|
3246919 | Todd | Apr 1966 | |
4361192 | Trowsdale | Nov 1982 | |
4379493 | Thibodeaux | Apr 1983 | |
4399877 | Jackson et al. | Aug 1983 | |
4463814 | Horstmeyer et al. | Aug 1984 | |
4697638 | Knight | Oct 1987 | |
4789032 | Rehm et al. | Dec 1988 | |
4828053 | Maurer et al. | May 1989 | |
4854397 | Warren et al. | Aug 1989 | |
4858705 | Thiery | Aug 1989 | |
4884643 | Wawrzynowski et al. | Dec 1989 | |
4940095 | Newman | Jul 1990 | |
5311952 | Eddison et al. | May 1994 |
Entry |
---|
Maurer et al., "Deep Earth Sampling System, Phase 1, Final Report," Maurer Engineering Inc., Jun. 1990. |
M.I.T Coil Drill-2000, Trenchless Technology and Construction, Inc. (updated). |
Pipeline & Utilities Construction, "Trenchless Pipelaying Report", Mar. 1990. |
Drawing No. 175S100, Assy, Steering Rotator Package, Stri-haf-ka & Associates (Undated). |
Number | Date | Country | |
---|---|---|---|
Parent | 766633 | Sep 1991 |