US PATENT SUBCLASS 359 / 889
.~ Movable in or out of optical path

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

885  DF  ABSORPTION FILTER {7}
889.~ Movable in or out of optical path

DEFINITION

Classification: 359/889

Movable in or out of optical path:

(under subclass 885) Subject matter wherein one or more filters may be selectively moved into and out of an optical path.

SEE OR SEARCH THIS CLASS, SUBCLASS:

887, for filter movable in and out of an optical path in a predetermined pattern resulting in the sequential addition of colors.

888, for such subject matter where the filter is of the neutral density type or has graded optical densities.