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. 27, 1979
Filed:
Jun. 28, 1978
Applicant:
Inventors:
Albert Fruth, Germering, DE;
Juergen Harenberg, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
179 / ;
Abstract
Circuit arrangement for time-dependent monitoring of the condition of lines with a scanning device operating with the so-called 'last-look' method, which recognizes condition alterations on the line and which produces a message supplemented by the address which corresponds with the scanned line. The time-dependent evaluation is obtained by comparing an adjustable theoretical time placed in a memory with an actual time formed by a counter.