US PATENT SUBCLASS 359 / 406
.~.~.~.~ Extensible structure

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}
402  DF  .~.~ Periscope {2}
405  DF  .~.~.~ With mechanical adjustment {1}
406.~.~.~.~ Extensible structure

DEFINITION

Classification: 359/406

Extensible structure:

(under subclass 405) Subject matter wherein the extension or elevation of the periscope is changed, usually by the use of

telescoping structures.