US PATENT SUBCLASS 396 / 570
.~ Photocell controlled
Current as of:
June, 1999
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396 /
HD
PHOTOGRAPHY
564
DF
FLUID-TREATING APPARATUS
{18}
570
.~ Photocell controlled
DEFINITION
Classification: 396/570
Photocell controlled:
(under subclass 564) Subject matter with a light- responsive device which regulates some portion of the fluid-treating apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
213+, for photocell exposure control circuits.
, FOR 916, for a foreign art collection involving photocell controlled fluid-treating apparatus.
SEE OR SEARCH CLASS
137, Fluid Handling,
93, for mixtures maintained by optical properties.
250, Radiant Energy, 200+, for photocell circuits.