Number | Date | Country | Kind |
---|---|---|---|
44 36 939.5 | Oct 1994 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4295823 | Ogawa et al. | Oct 1981 | |
4496396 | Steinbiss et al. | Jan 1985 | |
4541245 | Becker et al. | Sep 1985 | |
4955986 | Maury et al. | Sep 1990 |
Entry |
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German language Journal "Zement-Kalk-Gips" No. May 1978, pp. 236-238, w/English translation. |