JPS63187488U - - Google Patents

Info

Publication number
JPS63187488U
JPS63187488U JP7745987U JP7745987U JPS63187488U JP S63187488 U JPS63187488 U JP S63187488U JP 7745987 U JP7745987 U JP 7745987U JP 7745987 U JP7745987 U JP 7745987U JP S63187488 U JPS63187488 U JP S63187488U
Authority
JP
Japan
Prior art keywords
input circuit
terms
resistance
minute
button telephone
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.)
Granted
Application number
JP7745987U
Other languages
English (en)
Japanese (ja)
Other versions
JPH075740Y2 (ja
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 filed Critical
Priority to JP1987077459U priority Critical patent/JPH075740Y2/ja
Publication of JPS63187488U publication Critical patent/JPS63187488U/ja
Application granted granted Critical
Publication of JPH075740Y2 publication Critical patent/JPH075740Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP1987077459U 1987-05-23 1987-05-23 ボタン電話用拡声増幅器 Expired - Lifetime JPH075740Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987077459U JPH075740Y2 (ja) 1987-05-23 1987-05-23 ボタン電話用拡声増幅器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987077459U JPH075740Y2 (ja) 1987-05-23 1987-05-23 ボタン電話用拡声増幅器

Publications (2)

Publication Number Publication Date
JPS63187488U true JPS63187488U (US20020193084A1-20021219-M00002.png) 1988-11-30
JPH075740Y2 JPH075740Y2 (ja) 1995-02-08

Family

ID=30925485

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987077459U Expired - Lifetime JPH075740Y2 (ja) 1987-05-23 1987-05-23 ボタン電話用拡声増幅器

Country Status (1)

Country Link
JP (1) JPH075740Y2 (US20020193084A1-20021219-M00002.png)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61240742A (ja) * 1985-04-17 1986-10-27 Sharp Corp 電話機付属装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61240742A (ja) * 1985-04-17 1986-10-27 Sharp Corp 電話機付属装置

Also Published As

Publication number Publication date
JPH075740Y2 (ja) 1995-02-08

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