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:
May. 16, 1989
Filed:
Dec. 23, 1987
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313478 ; 313474 ; 313110 ; 350248 ; 358252 ;
Abstract
In a cathode ray tube, a single layer for prevention of a reflection of light rays is formed on a face plate having a non-spherical outer surface. The thickness of the layer is continuously decreased from the center region toward the peripheral regions of the face plate.
Takenaka, Shigeo. (1989). Cathode ray tube with light reflection film (U.S. Patent No. 4831307). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4831307
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile