Number | Date | Country | Kind |
---|---|---|---|
2-33095 | Nov 1990 | JPX | |
3-142763 | May 1991 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2297691 | Carlson | Oct 1942 | |
4636451 | Matkin et al. | Jan 1987 | |
4663263 | Ikeda et al. | May 1987 |
Number | Date | Country |
---|---|---|
42-23910 | Nov 1967 | JPX |
43-24748 | Oct 1968 | JPX |
Entry |
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Patent Abstract of Japan, vol. 10, No. 290 (P-503) [2346], Oct. 2, 1986 for JPA 61-110157, published May 28, 1986. |
Patent Abstracts of Japan, vol. 12, No. 203, (P-715) [3050], Jun. 11, 1988 for JPA 63-5357, published Jan. 11, 1988. |