US PATENT SUBCLASS 359 / 504
.~ Wide angle (e.g., door peep)

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

503  DF  EXTENDED SPACING STRUCTURE FOR OPTICAL ELEMENTS {3}
504.~ Wide angle (e.g., door peep)

DEFINITION

Classification: 359/504

Wide angle (e.g., door peep):

(under subclass 503) Subject matter wherein an objective element is designed to give a wide field of view, usually at least 120 degrees.

SEE OR SEARCH THIS CLASS, SUBCLASS:

744, for afocal lenses (e.g., Galilean telescopes).

819+, for lens mounts.