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3857924 | Halasz et al. | Dec 1974 | |
4316744 | Bergha | Feb 1982 | |
4839037 | Bertelsen et al. | Jun 1989 | |
4857290 | Shimizu | Aug 1989 | |
5028360 | Ito et al. | Jul 1991 | |
5165905 | Sasaki et al. | Nov 1992 | |
5624658 | Fitoussi et al. | Apr 1997 |
Number | Date | Country |
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60-042218 | Mar 1985 | JPX |
60-090811 | May 1985 | JPX |
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