Number | Date | Country | Kind |
---|---|---|---|
2314541 | Mar 1973 | DT |
Number | Name | Date | Kind |
---|---|---|---|
1914536 | Smith | Jun 1933 | |
2248128 | Seymour et al. | Jul 1941 | |
3103404 | Salvin et al. | Sep 1963 |
Entry |
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Bernardy et al., Melliand Textilberichte, vol. 39 (1958), pp. 292-297. |