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. 17, 2012
Filed:
Aug. 27, 2007
Applicants:
Yun Tae Kim, Suwon-si, KR;
Jeong Baek Lee, Suwon-si, KR;
Jong Cheol OH, Suwon-si, KR;
Inventors:
Assignee:
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A line interface unit in which a circuit to detect a calling line and a ring signal includes a connecting unit connected to a public switched telephone network (PSTN) to individually detect the calling line and the ring signal and to commonly use an insulating circuit electrically insulated from PSTN. A circuit to detect the calling line and the ring signal is simply implemented so that economical burden can be reduced.