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3486139 | Armstrong et al. | Dec 1969 | |
3568008 | Tanimura et al. | Mar 1971 | |
4712154 | Modsen | Dec 1987 |
Number | Date | Country |
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3800291A1 | Jul 1989 | DEX |
Entry |
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Wiley, C. W., "Home Appliances: Market for Solid State", Electronics, vol. 36, Sep. 13, pp. 14-15. |