A method and apparatus for providing uninterrupted DC and AC power for a desktop personal computer is described. The source of the uninterrrupted DC and AC power is derived from an integrated power supply that is sized to fit within the existing housings of most desktop personal computers as a plug-in...http://www.google.fr/patents/US4860185?utm_source=gb-gplus-shareBrevet US4860185 - Integrated uninterruptible power supply for personal computers
Integrated uninterruptible power supply for personal computers