Number | Name | Date | Kind |
---|---|---|---|
1463461 | Davis | Jul 1923 | |
1706811 | Pearson et al. | Mar 1929 | |
1712510 | Monie | May 1929 | |
2547418 | Turpin et al. | Dec 1951 | |
2798504 | Gast | Jul 1957 | |
3403703 | Reimann | Oct 1968 | |
3428077 | Scarfe | Feb 1969 | |
4275757 | Singer | Jun 1981 | |
4483643 | Guggemos | Nov 1984 | |
5081802 | Westhoff et al. | Jan 1992 | |
5303518 | Strickland | Apr 1994 | |
5584317 | McIntosh | Dec 1996 |
Number | Date | Country |
---|---|---|
423919 | May 1967 | CHX |
Entry |
---|
GU-Manhole Liners Ltd., Jun. 1989. |
"GU Lined Manholes", GU Industries Inc. (undated). |