US PATENT SUBCLASS 359 / 425
.~.~ Focusing or relatively sliding barrels

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

362  DF  COMPOUND LENS SYSTEM {8}
399  DF  .~ Telescope {12}
425.~.~ Focusing or relatively sliding barrels {2}
426  DF  .~.~.~> Internal focusing
427  DF  .~.~.~> With reticle

DEFINITION

Classification: 359/425

Focusing or relatively sliding barrels:

(under subclass 399) Subject matter wherein the telescope includes (a) a device for forming an in focus image of an object of varying distances or (b) tubes supporting optical elements movable axially into and out of one another.

(1) Note. Other subclasses in this class indented under subclass 362, Compound lens system, and titled "Separation of optical elements axially adjustable" may include subject matter related to subject matter in this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

410, for a binocular telescope that is body supported or with a handle and includes focusing means.

506, for an adjustable extended spacing structure for optical elements.