Number | Name | Date | Kind |
---|---|---|---|
2968705 | Monbeck et al. | Dec 1958 | |
3061736 | Devine | Oct 1960 | |
3515894 | Swing et al. | Jun 1970 | |
3601659 | Tanaka | Aug 1971 | |
3638040 | Mahmoud | Jan 1972 | |
3906335 | Watanabe et al. | Sep 1975 | |
3908132 | Krampe et al. | Sep 1975 | |
3999078 | Udvardi-Lakos | Dec 1976 | |
4090090 | Johnston | May 1978 | |
4096395 | Bogel et al. | Jun 1978 | |
4262214 | Patel | Apr 1981 | |
4356402 | Morimoto et al. | Oct 1982 | |
4384213 | Bogel | May 1983 | |
4405867 | Moakler et al. | Sep 1983 | |
4419591 | Irokawa et al. | Dec 1983 | |
4441032 | Sakurai et al. | Apr 1984 | |
4543492 | Inokuchi et al. | Sep 1985 | |
4652770 | Kumano | Mar 1987 | |
4667116 | Honjo et al. | May 1987 | |
4677309 | Ogawa | Jun 1987 |
Number | Date | Country |
---|---|---|
543156 | Feb 1977 | SUX |
Entry |
---|
T. Wolpert, "Uninterruptible Power Supply for Critical AC Loads-A New Approach", IEEE Transactions on Industry Applications, vol. 1A-10, No. 5, pp. 627-634, Sep./Oct. 1974. |