Number | Name | Date | Kind |
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5365144 | Layh | Nov 1994 |
Number | Date | Country |
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0 743 743 A2 | Nov 1996 | EPX |
Entry |
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International Search Report |
Patent Abstracts of Japan, vol. 96, No. 3, Mar. 29, 1996 & JP, A, 07-312414 (Hitachi Ltd.) Nov. 28, 1995. |
DE 4222068 C1 (ABB Patent GMBH.) Jun. 9, 1993, Claim 1, figure 1. |