US PATENT SUBCLASS 307 / 117
.~.~ Light, heat, vibratory or radiant energy

Current as of: June, 1999
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307 /   HD   ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS

112  DF  SWITCHING SYSTEMS {5}
116  DF  .~ Condition responsive {4}
117.~.~ Light, heat, vibratory or radiant energy

DEFINITION

Classification: 307/117

(under subclass 116) Subject matter in which the system is responsive to light, heat, vibratory or radiant energy.

SEE OR SEARCH CLASS

250, Radiant Energy,

206+, for miscellaneous photo-electric cell circuits.

361, Electricity: Electrical Systems and Devices,

173+, for photo cell controlled electromagnetic switching and relay systems.