US PATENT SUBCLASS 396 / 150
.~.~ Including focusing screen

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

89  DF  WITH EXPOSURE OBJECTIVE FOCUSING MEANS, FOCUSING AID, OR RANGEFINDING MEANS {28}
148  DF  .~ Having viewfinder {2}
150.~.~ Including focusing screen {2}
151  DF  .~.~.~> Film and focusing screen interchangeable
152  DF  .~.~.~> And reflector or refractor

DEFINITION

Classification: 396/150

Including focusing screen:

(under subclass 148) Subject matter including an optical device having a surface upon which a scene image formed by the exposure objective can be seen.

SEE OR SEARCH THIS CLASS, SUBCLASS:

, FOR 840+, for foreign art collections involving manual camera focusing with viewfinder including focusing screen.

SEE OR SEARCH CLASS

355, Photocopying,

44+, for focusing screen in projection printing or copying cameras.