US PATENT SUBCLASS 116 / 276
.~.~ Sight glass

Current as of: June, 1999
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116 /   HD   SIGNALS AND INDICATORS

200  DF  INDICATORS {32}
264  DF  .~ Fluid flow {4}
276.~.~ Sight glass

DEFINITION

Classification: 116/276

Sight glass:

(under subclass 264) Devices wherein the fluid may be directly viewed through a clear material.