Number | Date | Country | Kind |
---|---|---|---|
3507827 | Mar 1985 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3607843 | Vidaurri | Sep 1971 | |
3699087 | Wood et al. | Oct 1972 | |
3725362 | Walker | Apr 1973 | |
4046749 | Hawkins | Jun 1977 | |
4286018 | Asakura et al. | Aug 1981 |
Entry |
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Patent Abstracts of Japan, vol. 6, No. 57-165, Apr. 1982. |