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:
Mar. 15, 1988
Filed:
Mar. 23, 1987
Applicant:
Inventors:
Assignee:
Tamura Electric Works, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
379165 ; 371-5 ; 371 37 ; 375 17 ;
Abstract
Disclosed is a system for transmitting data by a data pulse train obtained by a combination of '0' or '1' bit pulse signals through a pair of lines connected beween a main unit and a key telephone set. The system includes a counter for sampling the pulse train and counting '0' or '1' bit pulse signals; a comparator for comparing a count of the counter with a reference value; and a correcting section for adding '0' or '1' correction pulses so as to set the count to be the reference value when the count is different from the reference value.