US PATENT SUBCLASS 968 / 569
.~.~ By a combination of different types of indicating devices, e.g., flaps and drums, etc. [G04C 17/00K]


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968 /   HD   HOROLOGY

564  DD  INDICATING THE TIME OPTICALLY BY ELECTRIC MEANS (subclass 577 takes precedence; by mechanical means subclasses 139 and 162) [G04C 17/00] precedence; by mechanical means subclasses 139 and 162) [G04C 17/00] {6}
567  DD  .~ By flaps [G04C 17/00F] {2}
569.~.~ By a combination of different types of indicating devices, e.g., flaps and drums, etc. [G04C 17/00K]