US PATENT SUBCLASS 396 / 241-- .~ With exposure filter

US PATENT SUBCLASS 396 / 241
.~ With exposure filter

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999 Terms of Use

396 /	HD	PHOTOGRAPHY

213	DF	EXPOSURE CONTROL CIRCUIT {23}
241		.~ With exposure filter

DEFINITION

Classification: 396/241

With exposure filter:

(under subclass 213) Subject matter includes an optical device which eliminates unwanted components of the light reaching the photos:graphic medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

209, for exposure data derived from film container which controls an optical filter.

275, for filter in front of photocell to block undesired wavelengths of light.

SEE OR SEARCH CLASS

352, Optics: Motion Pictures,

212+, for shutters with light-modifying blades including means to alter the color content of light.

359, Optics: Systems (Including Communication) and Elements,

586, 590 for light interference using device with layers of specified refracting index, and subclasses 885+ for generic color filters.