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0528676 | Feb 1993 | EP |
0529981 | Mar 1993 | EP |
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58-118977 | Jul 1983 | JP |
63-86472 | Apr 1988 | JP |
Entry |
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Patent Abstracts of Japan, vol. 007, No. 231 (P-229), Oct. 13, 1983 & JP 58 118977 A (Tokyo Shibaura Denki KK), Jul. 15, 1983 *abstract*. |
Patent Abstracts of Japan, vol. 012, No. 322 (E-652), Aug. 31, 1988 & JP 63 086472 A (NEC Corp), Apr. 16, 1988 *abstract*. |