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:
Feb. 14, 2006
Filed:
Jul. 19, 2001
Kouichi Saitou, Chonan, JP;
Kazumasa Hirai, Mobara, JP;
Tetsuo Asano, Mobara, JP;
Kotaro Aoki, Mobara, JP;
Yasuo Tanaka, Ichihara, JP;
Kouichi Saitou, Chonan, JP;
Kazumasa Hirai, Mobara, JP;
Tetsuo Asano, Mobara, JP;
Kotaro Aoki, Mobara, JP;
Yasuo Tanaka, Ichihara, JP;
Hitachi Ltd., Tokyo, JP;
Abstract
A projection tube having a high focusing performance at a low deflection power includes a funnel, a neck portion and a stem portion which seals the neck portion. The neck portion of the projection tube includes a first neck portion which is connected to the funnel and has a first neck outer diameter, and also includes a second neck portion which accommodates an electron gun and has a second neck outer diameter which is larger than the first neck outer diameter.