(under subclass 27) Subject matter where in one mode successive pulses cause the counter to count upward and in another mode cause the counter to count downward.
SEE OR SEARCH THIS CLASS, SUBCLASS:
61+, for direction control of signal information in charge transfer device counters and shift registers.
85, for reversible electromechanical counters.
123, 125 and 126, for pulse counting or dividing chains, per se, in the form of reversible counters.
SEE OR SEARCH CLASS
708, Electrical Computers: Arithmetic Processing and Calculating,
672, for incrementation or decrementation of pulse signals in digital computer systems.
