US PATENT SUBCLASS 377 / 53
.~ With photoelectric sensor

Current as of: June, 1999
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377 /   HD   ELECTRICAL PULSE COUNTERS, PULSE DIVIDERS, OR SHIFT REGISTERS: CIRCUITS AND SYSTEMS

27  DF  SYSTEMS {21}
53.~ With photoelectric sensor

DEFINITION

Classification: 377/53

With photoelectric sensor:

(under subclass 27) Subject matter including means for sensing electromagnetic radiation in the visible, ultraviolet, or infrared range.

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102, for counters of dividers, per se, using bistable electro-optical devices.

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250, Radiant Energy,

336.1+, for invisible radiant energy responsive signalling devices and subclasses 200+ for photocell controlled systems.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

514+, for miscellaneous nonlinear circuits whose operation is dependent upon the external effect of light energy.