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:
Nov. 02, 2004
Filed:
Aug. 06, 2002
Applicant:
Inventors:
Hiroaki Kawasaki, Chiba, JP;
Yukio Ogawa, Chiba, JP;
Yoshihisa Yonezawa, Chiba, JP;
Katsumi Takayama, Chiba, JP;
Assignee:
Futaba Corporation, Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 6/104 ;
U.S. Cl.
CPC ...
H01J 6/104 ;
Abstract
A fluorescent luminous tube includes a plurality of cathode filaments, a multiplicity of a cathode wirings, each cathode wiring including one or more terminal portions and a wiring portion and being formed of a metal layer, and one or more intermediate portions, each being made of a metal layer. The cathode filament is grouped into at least one set of one or more filaments and filaments in each set are connected in series by fixing an end portion thereof on a terminal portion or an intermediate portion by ultrasonic wire bonding or ultrasonic bonding.