US PATENT SUBCLASS 396 / 475
.~.~ Having mechanically delayed closing
Current as of:
June, 1999
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396 /
HD
PHOTOGRAPHY
439
DF
CAMERA DETAIL
{15}
452
DF
.~ Shutter {12}
475
.~.~ Having mechanically delayed closing {3}
476
DF
.~.~.~
> Including pneumatic means
477
DF
.~.~.~
> Including gear means
478
DF
.~.~.~
> Including cam means
DEFINITION
Classification: 396/475
Having mechanically delayed closing:
(under subclass 452) Subject matter having means to mechanically hold the shutter fully open for a certain period of time.
SEE OR SEARCH THIS CLASS, SUBCLASS:
472, for mechanically delayed release.
, FOR 896+, for foreign art collections involving a shutter having pivoting or rotating blade with retard means.
, FOR 907, for a foreign art collection involving a shutter release and timing means.
SEE OR SEARCH CLASS
73, Measuring and Testing,
1.42+, for timing apparatus for a camera shutter.
