Number | Date | Country | Kind |
---|---|---|---|
2701924 | Jan 1977 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3517174 | Ossfeldt | Jun 1970 | |
3810119 | Zieve et al. | May 1974 | |
3978327 | Huber | Aug 1976 | |
4012717 | Censier et al. | Mar 1977 | |
4015804 | Dobler et al. | Apr 1977 | |
4030074 | Giorcelli | Jun 1977 | |
4032757 | Eccles | Jun 1977 |
Number | Date | Country |
---|---|---|
2258917 | Jun 1973 | DEX |
2710466 | Sep 1977 | DEX |
Entry |
---|
Costa et al.: Sao-Paulo Metro E-W Line Innovations, IEEE Industry Applications Society Annual Meeting, Oct. 2-6, 1977, p. 1106, last paragraph in the first column of interest, pp. 1105-1109. |