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:
Jun. 09, 1987
Filed:
Jul. 29, 1985
Applicant:
Inventors:
Shoji Shirai, Koganei, JP;
Fumio Noda, Chiba, JP;
Yoshiaki Iidaka, Chiba, JP;
Masaaki Yamauchi, Togane, JP;
Masakazu Fukushima, Tokyo, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Device Engineering Co., Ltd., Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313414 ; 313449 ;
Abstract
An inline electron gun for color picture tube comprises a main lens including a plurality of electrodes spaced apart to each other and each of these electrodes has a pheripheral rim. Two of these peripheral rims oppose to each other and at least one of the peripheral rims has such an uneven shape that focusing force for the electron beams is increased.