US PATENT SUBCLASS 396 / 570-- .~ Photocell controlled

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.