JPS521437A - Surge protection system - Google Patents

Surge protection system

Info

Publication number
JPS521437A
JPS521437A JP7674475A JP7674475A JPS521437A JP S521437 A JPS521437 A JP S521437A JP 7674475 A JP7674475 A JP 7674475A JP 7674475 A JP7674475 A JP 7674475A JP S521437 A JPS521437 A JP S521437A
Authority
JP
Japan
Prior art keywords
protection system
surge protection
electronization
varistor
communication device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7674475A
Other languages
Japanese (ja)
Inventor
Shigefumi Fujimoto
Eizo Nara
Takao Ueno
Yoshiichi Chiba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7674475A priority Critical patent/JPS521437A/en
Publication of JPS521437A publication Critical patent/JPS521437A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: A surge protection system for communication device capable of easily achieving electronization of exchange speech path without using lighting conductor, varistor or the like.
COPYRIGHT: (C)1977,JPO&Japio
JP7674475A 1975-06-24 1975-06-24 Surge protection system Pending JPS521437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7674475A JPS521437A (en) 1975-06-24 1975-06-24 Surge protection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7674475A JPS521437A (en) 1975-06-24 1975-06-24 Surge protection system

Publications (1)

Publication Number Publication Date
JPS521437A true JPS521437A (en) 1977-01-07

Family

ID=13614101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7674475A Pending JPS521437A (en) 1975-06-24 1975-06-24 Surge protection system

Country Status (1)

Country Link
JP (1) JPS521437A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01105204A (en) * 1987-07-03 1989-04-21 Unitika Ltd Polarization film and its manufacture

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244081A1 (en) * 1972-09-08 1974-03-28 Peter Kofahl INPUT PROTECTIVE CIRCUIT FOR SENSITIVE DEVICE INPUTS

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244081A1 (en) * 1972-09-08 1974-03-28 Peter Kofahl INPUT PROTECTIVE CIRCUIT FOR SENSITIVE DEVICE INPUTS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01105204A (en) * 1987-07-03 1989-04-21 Unitika Ltd Polarization film and its manufacture

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