US PATENT SUBCLASS 396 / 497
.~.~.~ Plural oscillating blades

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

439  DF  CAMERA DETAIL {15}
452  DF  .~ Shutter {12}
493  DF  .~.~ Pivoting or rotating blade type {3}
497.~.~.~ Plural oscillating blades {4}
498  DF  .~.~.~.~> Having gear means
499  DF  .~.~.~.~> Having pneumatic actuator
500  DF  .~.~.~.~> Symmetrical opening
501  DF  .~.~.~.~> Opposite movement

DEFINITION

Classification: 396/497

Plural oscillating blades:

(under subclass 493) Subject matter wherein there are two or more blades that are rotatably reciprocated about a fixed axis from an open to a closed position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

, FOR 901, for a foreign art collection involving a shutter having plural oscillating blades.