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:
May. 16, 1978
Filed:
Jan. 06, 1977
Battle Hargrove Klyce, Middletown, NJ (US);
Frank Peter Sansone, Freehold, NJ (US);
Roger Mark Ziegler, Tinton Falls, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
Intervals between zero crossings of tone signals on two incoming lines are measured by a clock driven, free running binary counter common to the two lines and by an overflow counter individual to each line. The overflow counter is reset by the reception of the zero crossing of the tone signal and is then advanced by each overflow and recycle of the common counter. The common count number, produced when the zero crossing at the start of the interval is received, is processed with the common count number and the overflow number, produced when the zero crossing at the end of the interval is received, to calculate the duration of the interval and thereby determine the frequency of the tone.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile