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:
Jun. 20, 1995
Filed:
Apr. 18, 1994
Yoon J Lee, Daejeon, KR;
Young H Im, Daejeon, KR;
Hong S Nam, Chung Book, KR;
Sueng H Lee, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Korea Telecommunication Authority, Seoul, KR;
Abstract
A protection module connected between a main distributing frame and an exchange, for protecting a subscriber circuit from an overvoltage or an overcurrent, comprises an overcurrent protecting device 21 connected between an output of the main distributing frame and a tip line of the exchange; an overcurrent protecting device 211 connected between an output of the main distributing frame and a ring line of the exchange; and an overvoltage protecting device 22 connected in parallel between the tip line and the ring line, having an output (GND) line connected to the exchange.