Number | Date | Country | Kind |
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3-047194 | Mar 1991 | JPX |
Number | Name | Date | Kind |
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4719550 | Powell et al. | Jan 1988 | |
4878163 | Yamato et al. | Oct 1989 | |
5159539 | Koyama | Oct 1992 |
Number | Date | Country |
---|---|---|
0293869 | Dec 1988 | EPX |
8407667 | Nov 1985 | FRX |
Entry |
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"New Conversion System For UPS Using High Frequency Link" IEEE PESC 1988 Record. |