The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 02, 1984
Filed:
Jul. 23, 1981
Applicant:
Inventor:
Ryoji Hirai, Mobara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313403 ; 313402 ;
Abstract
A color picture tube suited for use as a video data terminal equipment of a computer system and capable of displaying characters, graphs and the like with high fineness. In a shadow mask of dot aperture type to be used in the color picture tube, a space between the adjacent dot apertures aligned on a same line in the horizontal direction and a space between the adjacent dot aperture aligned on a same line in the vertical direction is selected equal to each other.