US PATENT SUBCLASS 968 / 893
.~.~ Backup power supply [G04G 1/00C5]


Current as of: June, 1999
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968 /   HD   HOROLOGY

876  DD  SUBJECT MATTER NOT PROVIDED FOR IN SUBCLASSES 901 TO 975, E.G., INTEGRATED CIRCUITS FOR ELECTRONIC TIMEPIECES [G04G 1/00] {6}
888  DD  .~ Electric power supply circuits (in general H02M 1/00) [G04G 1/00C] {4}
893.~.~ Backup power supply [G04G 1/00C5]