Number | Name | Date | Kind |
---|---|---|---|
3714709 | Liederbach | Feb 1973 |
Number | Date | Country |
---|---|---|
0035135 | Feb 1981 | EPX |
WO9308601 | Apr 1993 | EPX |
2441902A1 | Sep 1974 | DEX |
0150871 | Jul 1987 | JPX |
Entry |
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Patent Abstracts of Japan vol. 18, No. 88 (E-1507) JP-A-05 292 756 (Toshiba Corp.) 5 Nov. 1993 *abstract*. |