US PATENT SUBCLASS 89 / 36.14
.~.~ With vision slit or gun port closures

Current as of: June, 1999
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89 /   HD   ORDNANCE

36.01  DF  SHIELDS {12}
36.13  DF  .~ Turret type {1}
36.14.~.~ With vision slit or gun port closures

DEFINITION

Classification: 89/36.14

With vision slit or gun port closure:

(under subclass 36.13) Devices provided with movable means to cover or uncover the slit or port.

(1) Note. Also included in this subclass are bullet proof vision blocks and feriscopes.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements,

402+, for a periscope, per se.