Number | Name | Date | Kind |
---|---|---|---|
RE. 33751 | Geczy et al. | Nov 1991 | |
3331454 | Conrad | Jul 1967 | |
3589135 | Ede | Jun 1971 | |
3635036 | Hooper | Jan 1972 | |
3693734 | Richmond | Sep 1972 | |
3833077 | Lavallee | Sep 1974 | |
3837413 | Dunn | Sep 1974 | |
3878903 | Cherrington | Apr 1975 | |
3894402 | Cherrington | Jul 1975 | |
3902563 | Dunn | Sep 1975 | |
3905431 | Hasewend | Sep 1975 | |
3917011 | Hester | Nov 1975 | |
3945443 | Barnes | Mar 1976 | |
4013134 | Richmond et al. | Mar 1977 | |
4043136 | Cherrington | Aug 1977 | |
4091631 | Cherrington | May 1978 | |
4117895 | Ward et al. | Oct 1978 | |
4143721 | Zuvela et al. | Mar 1979 | |
4176985 | Cherrington | Dec 1979 | |
4221503 | Cherrington | Sep 1980 | |
4248314 | Cunningham et al. | Feb 1981 | |
4319648 | Cherrington | Mar 1982 | |
4453603 | Voss et al. | Jun 1984 | |
4506745 | Bjor | Mar 1985 | |
4700788 | Langner | Oct 1987 | |
5226488 | Lessard et al. | Jul 1993 | |
5314267 | Osadchuk | May 1994 | |
5452967 | Fuller | Sep 1995 | |
5456552 | Cherrington | Oct 1995 | |
5553680 | Hathaway | Sep 1996 | |
5628585 | Parish, II et al. | May 1997 | |
5979573 | Osadchuk | Nov 1999 | |
5979574 | Osadchuk | Nov 1999 | |
6109371 | Kinnan | Aug 2000 |
Number | Date | Country |
---|---|---|
832325 | Jan 1970 | CA |
962996 | Feb 1975 | CA |
1067-190 | Jan 1984 | SU |
WO 8808480 | Jan 1988 | WO |
Entry |
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Trenchless Technology Special Product Focus, Utility Construction & Maintenance, Jun./Jul.,1992, p. 29. |