Number | Date | Country | Kind |
---|---|---|---|
52-85927 | Jul 1977 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2458040 | Weller | Jan 1949 | |
2713480 | Ruckstahl | Jul 1955 | |
3581679 | Jansen et al. | Jan 1971 | |
3850318 | Wentworth | Nov 1974 | |
3982887 | Kendziora et al. | Sep 1976 |
Entry |
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5 pages of "Chemical Apparatus Encyclopaedia" Enlarged Edition Published by K. K. Kaguko Kogya Sha May 25, 1976. |