Number | Date | Country | Kind |
---|---|---|---|
53-98268 | Aug 1978 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4131749 | Kiedik et al. | Dec 1978 |
Number | Date | Country |
---|---|---|
880895 | Oct 1961 | GBX |
905994 | Aug 1962 | GBX |
Entry |
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Derent Belgian Patent Report, vol. 62 B, P. A15, (May 4, 1960). |