US PATENT SUBCLASS 427 / 163.3
.~.~ Projection screen

Current as of: June, 1999
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427 /   HD   COATING PROCESSES

162  DF  OPTICAL ELEMENT PRODUCED {2}
163.1  DF  .~ Polarizer, windshield, optical fiber, projection screen, or retroreflector {3}
163.3.~.~ Projection screen

DEFINITION

Classification: 427/163.3

Projection screen:

(under subclass 163.1) Processes wherein the optical element is a projection screen.

(1) Note. Moving picture and stereopticon screens are considered as projection screens and proper for this subclass.

SEE OR SEARCH CLASS

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

443+, for projection screens, per se.