Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Reexamination Certificate
2007-12-11
2007-12-11
Sherry, Michael (Department: 2836)
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
C307S066000, C307S139000, C307S140000, C429S009000
Reexamination Certificate
active
11047988
ABSTRACT:
Uninterruptible power supplies (UPSs) are generally discussed herein with particular discussions extended to fuel-cell-based UPSs used in conjunction with DC power supplies for improved operating efficiencies. With a wide voltage DC power supply, a DC-AC inverter may be omitted from the UPS and power from a back up power source, such as a battery or a fuel cell, may be applied directly to the DC power supply without performing two power conversions. The end result is a more efficient system capable of longer operating time.
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Internet site; http://www.pcguide.com/ref/power/ext/ups/over-c.html; entitled Uninterruptible Power Supply Overview, Jun. 17, 2005, pp. 1-3.
Internet site, http://www.pcguide.com/ref/power/ext/ups/typesOnLine-c.html; entitled Online (“True”) UPS, Jun. 17, 2005, pp. 1-3.
Gonzales James
Ji Liang-Jun
Rogers Bradley
Tamizhmani Govindasamy
Arizona Board of Regents
Christie Parker & Hale LLP
Mai Tien
Sherry Michael
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