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:
Jan. 01, 2002
Filed:
Nov. 12, 1999
Nobuyuki Yasuda, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a caller telephone number storage system, when the polarity inversion detector detects the polarity inversion of the line , the timer controller starts measuring six seconds. When the short ringer detector detects a short ringing from the line supplied via the ring signal binary encoder , a short ringer detection signal is sent to the relay controller . When the relay controller receives the short ringer detection signal, the timer controller controls the line closure relay within six seconds to dc close the line . Thereafter, the data receiver sends the number display data to store it into the data storage means . At the same time, the data receiver sends reception completion signal to the timer controller . Thus, the timer is cleared.