US PATENT SUBCLASS 348 / 784
.~.~.~.~.~.~ With correcting plate

Current as of: June, 1999
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348 /   HD   TELEVISION

739  DF  VIDEO DISPLAY {13}
744  DF  .~ Projection device {7}
776  DF  .~.~ Cathode-ray tube image source {4}
781  DF  .~.~.~ With optical element {3}
782  DF  .~.~.~.~ Mirror arrangement {1}
783  DF  .~.~.~.~.~ Concave mirror {1}
784.~.~.~.~.~.~ With correcting plate

DEFINITION

Classification: 348/784

With correcting plate:

(under subclass 783) Subject matter includes an optical plate to correct each zone of the reflector for spherical aberration.