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. 04, 1980
Filed:
Mar. 27, 1979
Applicant:
Inventors:
Takao Kishino, Mobara, JP;
Gentaro Tanaka, Mobara, JP;
Assignee:
Futaba Denshi Kogyo K.K., Chiba, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H05B / ;
U.S. Cl.
CPC ...
315167 ; 313190 ; 313497 ;
Abstract
A multi-digit luminescent display tube having a plurality of pattern display sections arranged in the form of a matrix within a vacuum envelope is disclosed. The pattern display sections include a plurality of anodes, control grids, cathode filaments and shielding members. The shielding members are arranged midway between rows or columns of the pattern display sections in a direction along which the cathode filaments are stretched, whereby to shield each of the rows or columns of the pattern display sections from thermions emitted from the cathode filaments which are stretched in different rows or columns of the pattern display sections.