Number | Date | Country | Kind |
---|---|---|---|
10820/79 | Dec 1979 | CHX |
Number | Name | Date | Kind |
---|---|---|---|
1713751 | Dorogi et al. | May 1929 | |
3149017 | Ehrreich et al. | Sep 1964 | |
3663288 | Miller | May 1972 |
Number | Date | Country |
---|---|---|
451291 | Jan 1936 | GBX |
1226946 | Mar 1971 | GBX |
Entry |
---|
Law, H. B., Pre-Tensioned Wire, RCA TN No. 31, Aug. 1957. |