Number | Date | Country | Kind |
---|---|---|---|
57-21316 | Feb 1982 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
1430558 | Jimerson | Oct 1922 | |
3098357 | Marsh | Jul 1963 | |
3911672 | Irwin | Oct 1975 | |
3990231 | Irwin | Sep 1976 | |
4074520 | Mansson et al. | Feb 1978 |
Number | Date | Country |
---|---|---|
2232286 | Jan 1973 | DEX |
7312457 | Apr 1973 | DEX |
2633387 | Feb 1977 | DEX |
Entry |
---|
"Huette des Ingenieurs Taschenbuch", Berlin 1960, 28th Ed., pp. 832-833. |