US PATENT SUBCLASS 356 / 154
.~ With screen

Current as of: June, 1999
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356 /   HD   OPTICS: MEASURING AND TESTING

138  DF  ANGLE MEASURING OR ANGULAR AXIAL ALIGNMENT {11}
154.~ With screen {1}
155  DF  .~.~> Wheel alignment

DEFINITION

Classification: 356/154

(under subclass 138) Subject matter including a viewing screen or surface upon which an image or spot of light may be projected.

SEE OR SEARCH CLASS

353, Optics: Image Projectors, for projectors generally.

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

443+, for projection screens, per se.