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:
Oct. 22, 1985
Filed:
Oct. 06, 1983
Applicant:
Inventor:
Stephen J Durham, Cupertino, CA (US);
Assignee:
Cermetek Microelectronics, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
179 / ; 179 / ;
Abstract
A remote-telemetry unit for monitoring and reporting to a remote location over a telephone line the condition of an associated piece of equipment at predetermined times, when polled and when the equipment condition dictates, the unit including a direct access arrangement, a switched-frequency Friend Biquad type filter and a detector, the combination for detecting tone signals developed on the line, and a digital-to-analog converter and a controller, in combination with the direct access arrangement for developing on the line tone signals for dialing and for condition reporting.