US PATENT SUBCLASS 359 / 461
.~ Roll up screen

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

443  DF  PROJECTION SCREEN {13}
461.~ Roll up screen

DEFINITION

Classification: 359/461

Roll up screen:

(under subclass 443) Subject matter wherein the screen is flexible and can be wound around a roller for easy storage or for portability.