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. 05, 1984
Filed:
Apr. 30, 1981
Applicant:
Inventor:
John H Steinmetz, Norwalk, CT (US);
Assignee:
Pitney Bowes Inc., Stamford, CT (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324403 ; 324 / ; 324409 ;
Abstract
A circuit for testing a segment of a digital display comprising a segment of a digital display having a cathode filament for conducting electrical current and for emitting electrons, and detecting means connected to the cathode filament for detecting electrical current flow across it. Also provided is a method for testing the proper operation of characters or digits of a digital display.