US PATENT SUBCLASS 968 / 163
.~.~ By means of turning discs (disc-shaped indicating devices with a reference mark or a window subclass 145; discs driven by clockwork and producing optical special effects subclass 382; with inscriptions or drawings driven by a clockwork subclass 384; with figures or parts of figures driven by clockwork subclass 386) [G04B 19/20B]


Current as of: June, 1999
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968 /   HD   HOROLOGY

139  DD  INDICATING BY VISUAL MEANS (by electric lamps subclass 576; indicating by acoustical means mechanically subclass 217, electrically subclass 580; acoustic signals at preselected times mechanically subclass 229, electrically subclass 580; optical time signals at preselected times mechanically subclass 244, electrically subclass 577; continuous time indication by electric means subclass 564; visible signalling arrangements G08B 5/00) [G04B 19/00] {10}
162  DD  .~ Indicating by numbered bands, drums, discs, or sheets (indicating means without numbers or hands in general subclass 142; illuminated subclass 213; with optical projection digest subclass; gearwork and linking in general subclass 85; electrically driven subclass 579; counter mechanisms G06M) [G04B 19/20] {4}
163.~.~ By means of turning discs (disc-shaped indicating devices with a reference mark or a window subclass 145; discs driven by clockwork and producing optical special effects subclass 382; with inscriptions or drawings driven by a clockwork subclass 384; with figures or parts of figures driven by clockwork subclass 386) [G04B 19/20B]