US PATENT SUBCLASS 385 / 140
.~ Attenuator

Current as of: June, 1999
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385 /   HD   OPTICAL WAVEGUIDES

134  DF  ACCESSORIES {5}
140.~ Attenuator

DEFINITION

Classification: 385/140

Attenuator:

(under subclass 134) Subject matter involving a device which reduces the intensity of light entering or exiting a waveguide.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements,

599+, for diffusion, subclasses 885+ for absorption filters, and subclasses 227+ for moving discrete opaque elements into or out of light paths.