Number | Date | Country | Kind |
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48-79297 | Jul 1973 | JA |
Number | Name | Date | Kind |
---|---|---|---|
2142980 | Huijser et al. | Jan 1939 | |
3279975 | Yoshii et al. | Oct 1966 |
Entry |
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Frazer, A. H. High Temperature Resistant Polymers, Interscience Publishers, N. Y., 1968, pp. 22-25. |