US PATENT SUBCLASS 250 / 227.25
.~.~.~.~ Fluid coupling

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
216  DF  .~ Optical or pre-photocell system {11}
227.11  DF  .~.~ Light conductor {14}
227.24  DF  .~.~.~ With coupling enhancement means {1}
227.25.~.~.~.~ Fluid coupling

DEFINITION

Classification: 250/227.25

Fluid coupling:

(under subclass 227.24) Subject matter in which the coupling enhancement means is a fluid, i.e., in the gas or liquid state.