US PATENT SUBCLASS 362 / 167
.~.~.~ With separate movable selective elements

Current as of: June, 1999
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362 /   HD   ILLUMINATION

157  DF  SELF POWERED LAMP {16}
159  DF  .~ Nonelectric {9}
166  DF  .~.~ Selective wavelength transmitting or light blocking means {2}
167.~.~.~ With separate movable selective elements {1}
168  DF  .~.~.~.~> Plural

DEFINITION

Classification: 362/167

(under subclass 166) Subject matter having a refractor or transparent housing closure (i.e., "lens") and wherein the selective wavelength transmitting or light blocking means is movable between the light source and the lens.