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. 28, 1994
Filed:
Jul. 07, 1992
Applicant:
Inventors:
Ryuichi Murai, Katano, JP;
Kinzo Nonomura, Ikoma, JP;
Jumpei Hashiguchi, Neyagawa, JP;
Satoshi Kitao, Kyoto, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313422 ; 313431 ; 313433 ; 313634 ;
Abstract
Both side walls in a periodic magnetic lens device which are arranged in parallel with a planar fluorescent display surface and which define therebetween electron beam paths for guiding electron beams are formed in a shape which is concave-curved, and accordingly, the guide paths have a cross-sectional shape which is substantially rotationally symmetric in order to increase the possible travel distance of an electron beam.