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:
Sep. 06, 1977
Filed:
Mar. 29, 1975
Applicant:
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313496 ; 313519 ; 313220 ; 313313 ;
Abstract
A multi-column fluorescent display tube having a casing composed of a base plate and a cover plate, multi-column pattern display sections each composed of a plurality of segment anodes with fluorescent material layers thereon provided on the upper surface of the base plate, cathodes provided opposite to the pattern display sections, electrification preventive layers provided around and in the vicinity of the segment anodes on the base plate and electrically connected to prevent electrification and to intercept an external electric field, and terminal lead-in wires provided outside the casing and air-tightly connected through the casing to the respective segment anodes, cathodes and electrification preventive layers.