Number | Name | Date | Kind |
---|---|---|---|
3849420 | Tong | Nov 1974 | |
4046553 | Takahashi et al. | Sep 1977 | |
4105435 | Nishiyama et al. | Aug 1978 | |
4133675 | Schurter et al. | Jan 1979 |
Number | Date | Country |
---|---|---|
2546845 | Apr 1977 | DEX |
Entry |
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Johnston et al., European Patent Application No. 0000483, published 02/07/79. |