US PATENT SUBCLASS 968 / 234
.~.~ Driving, e.g., by springs or common drive with the clockwork, etc.; gears; escapements (escapements in general subclass 95; regulating means for clockworks in general subclass 103) [G04B 23/02D]


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968 /   HD   HOROLOGY

229  DD  ARRANGEMENTS PRODUCING ACOUSTIC SIGNALS AT PRESELECTED TIMES (optical time indicating subclass 139, 564, and 577; indicating by acoustic means subclass 217; indicating time by means other than acoustic or optical or by a combination of means subclass 243; acoustic time signals produced electrically subclass 580; coin-freed alarm clocks G07F 17/00B; acoustic signalling means G08B 3/00) [G04B 23/00] {2}
231  DD  .~ Alarm clocks (electrically released alarm signals subclass 580; waking up by electric lamps subclass 578; by other means subclass 244; alarm clocks with electric contacts subclass 608) [G04B 23/02] {11}
234.~.~ Driving, e.g., by springs or common drive with the clockwork, etc.; gears; escapements (escapements in general subclass 95; regulating means for clockworks in general subclass 103) [G04B 23/02D]