(under the class definition) Subject matter wherein an optical instrument establishes an optical axis whereby an observer may precisely orient the optical instrument relative to some remote point toward which the optical axis is directed, or and usually whereby the observer may orient some device such as a gun to which the optical instrument is attached.
(1) Note. Where a reticle is recited in conjunction with a compound optical system classification is generally in Class 359, Optics: Systems (Including Communication) and Elements,
subclass 428. However, where the reticle or reticle image is adjustable for the purpose of changing the observer's line of sight relative to the central optical axis of the instrument, classification will be in this class.
SEE OR SEARCH CLASS
33, Geometrical Instruments,
227+, for similar subject matter where no significant optical structure is claimed.
