Number | Date | Country | Kind |
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8-339103 | Dec 1996 | JP |
Number | Name | Date | Kind |
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3791861 | Sundahl, Jr. | Feb 1974 | |
4681538 | DeLucca et al. | Jul 1987 |
Number | Date | Country |
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0 567 686 A2 | Nov 1993 | EP |
0 653 395 A1 | May 1995 | EP |
3-228502 | Mar 1991 | JP |
Entry |
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Database WPI; Section Ch, Week 9211; Derwent Publications Ltd., London, GB; XP002086142 & JP 04 026546 A (NGK Insulators Ltd); Jan. 29, 1992 *abstract*. |
Database WPI; Section Ch, Week 9147; Derwent Publications Ltd., London, GB; Class L02, AN 91-343117 XP002086143 & JP 03 228502 A (Mitsubishi Materials Corp); Oct. 9, 1991 *abstract*. |