US PATENT SUBCLASS 307 / 118
.~.~ Fluid pressure, density, level, velocity or humidity

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}
118.~.~ Fluid pressure, density, level, velocity or humidity

DEFINITION

Classification: 307/118

(under subclass 116) Subject matter in which the system is responsive to fluid pressure, density, level, velocity or humidity.

SEE OR SEARCH CLASS

340, Communications: Electrical,

603+, for this subject matter in an electric alarm system.