Number | Date | Country | Kind |
---|---|---|---|
6-165160 | Jul 1994 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2938048 | Odenweller et al. | May 1960 | |
4714771 | Liu | Dec 1987 |
Number | Date | Country |
---|---|---|
1-143880 | Jun 1989 | JPX |
Entry |
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Kagaku Binran, Kiso-hen 2, third revised edition, pp. 338-343, published Jun. 25, 1994. |