Number | Date | Country | Kind |
---|---|---|---|
2-114858 | Apr 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4462680 | Ikeda | Jul 1984 | |
4883019 | Menjo et al. | Nov 1989 | |
4956669 | Nakamura | Sep 1990 | |
5053816 | Takahashi | Oct 1991 |
Number | Date | Country |
---|---|---|
0030566 | Feb 1984 | JPX |
0142772 | Jun 1989 | JPX |
Entry |
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IBM Technical Disclosure Bulletin, Sep. 1972, vol. 15, No. 4. |