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:
Jul. 16, 1991
Filed:
Oct. 17, 1989
Applicant:
Inventors:
Assignee:
Murata Mfg. Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
3403 / ; 3403 / ; 375-8 ; 379 98 ; 379413 ;
Abstract
A data communications system includes a high impedance input circuit, which serves as an input circuit linking between a communications interface and a data terminal equipment, and a power supply circuit which obtains a receiving signal from an input terminal of the high impedance input circuit and draws electric power from the receiving signal to supply to the data communications system.