US PATENT SUBCLASS 353 / 27 A-- .~.~ Automatic

US PATENT SUBCLASS 353 / 27 A
.~.~ Automatic

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

Internet Version by PATENTEC © 1999 Terms of Use

353 /	HD	OPTICS: IMAGE PROJECTORS

25	DF	SELECTIVE DATA RETRIEVAL {2}
27 R	DF	.~ Plural picture rows on single microcard {1}
27 A		.~.~ Automatic

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 353/27

(under subclass 25) Subject matter wherein the data is stored in numerous individual areas which are arranged in a plurality of rows or columns on a rectangular sheet of microfilm which is in a flat condition during projection; the

optical path and microcard usually being relatively movable to select the individual area to be projected by alignment with the optical path which may include moving a mask to block light from going through the undesired data.