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:
Apr. 25, 1989
Filed:
Aug. 07, 1987
Applicant:
Inventor:
Glen Dash, Carlisle, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ; H02M / ;
U.S. Cl.
CPC ...
379-1 ; 379 28 ; 379 32 ; 324111 ; 320-1 ;
Abstract
A telephone network test apparatus for testing for a number of different conditions that can cause harm to a telephone network. Described herein is a circuit for measuring signal power level as well as a circuit for measuring surge voltages. Finally there is described a circuit for measurement of voltage balance.