US PATENT SUBCLASS 49 / 50
WITH PROTECTIVE GRILLE OR SAFETY GUARD

Current as of: June, 1999
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49 /   HD   MOVABLE OR REMOVABLE CLOSURES

50WITH PROTECTIVE GRILLE OR SAFETY GUARD {6}
51  DF  .~> Facing interconnected movable louvers
52  DF  .~> Closure operator extends through grille {1}
54  DF  .~> Carried by closure to vacated opening
55  DF  .~> Adjustable to various size opening
56  DF  .~> Moves relative to primary closure
57  DF  .~> Removable

DEFINITION

Classification: 49/50

(under the class definition) Device comprising (1) a main closure and an openwork panel overlying the main closure in back-to-back relationship, one of which is movable or removable, or (2), a movable or removable shield which blocks a passage vacated by a closure to prevent unlawful entry or accidental travel through the passage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

38+, for a single closure with spaced openings which register with the openings in a passage blocking member.

61+, for an auxiliary closure and see the search notes thereto for the loci of other back-to-back closures.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings), 37, for a workman's guard or support on or adjacent a portal frame, and subclass 208 for a grille or panel permanently mounted on a barrier adjacent a portal opening.

109, Safes, Bank Protection, or a Related Device,

11+, for movable protective shields for display partitions and counters.

454, Ventilation,

196+, for a window ventilator insertable in a passage vacated by a closure.