Number | Date | Country | Kind |
---|---|---|---|
63-51285 | Mar 1988 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4032691 | Kido et al. | Jun 1977 | |
4764178 | Gregory et al. | Aug 1988 |
Number | Date | Country |
---|---|---|
2159971 | Dec 1985 | GBX |
Entry |
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Patent Abstracts of Japan, vol. 10, No. 159 (M-486) [2215], Jun. 7, 1986. |