JPS50140207A - - Google Patents

Info

Publication number
JPS50140207A
JPS50140207A JP49048100A JP4810074A JPS50140207A JP S50140207 A JPS50140207 A JP S50140207A JP 49048100 A JP49048100 A JP 49048100A JP 4810074 A JP4810074 A JP 4810074A JP S50140207 A JPS50140207 A JP S50140207A
Authority
JP
Japan
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
JP49048100A
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 JP49048100A priority Critical patent/JPS50140207A/ja
Publication of JPS50140207A publication Critical patent/JPS50140207A/ja
Pending legal-status Critical Current

Links

Landscapes

  • Near-Field Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
JP49048100A 1974-04-27 1974-04-27 Pending JPS50140207A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP49048100A JPS50140207A (ja) 1974-04-27 1974-04-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP49048100A JPS50140207A (ja) 1974-04-27 1974-04-27

Publications (1)

Publication Number Publication Date
JPS50140207A true JPS50140207A (ja) 1975-11-10

Family

ID=12793886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP49048100A Pending JPS50140207A (ja) 1974-04-27 1974-04-27

Country Status (1)

Country Link
JP (1) JPS50140207A (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61220531A (ja) * 1985-03-26 1986-09-30 Tokyo Electric Power Co Inc:The 洞道内保安通信システム
JPH02290338A (ja) * 1989-01-18 1990-11-30 Hitachi Denshi Ltd 地下移動系と地上移動系との無線連絡通話方式
JPH07143631A (ja) * 1993-09-24 1995-06-02 Kansai Electric Power Co Inc:The 人孔内監視方法及び人孔内監視装置並びにそれに使用する伝送装置
JP2011154629A (ja) * 2010-01-28 2011-08-11 Nippon Telegr & Teleph Corp <Ntt> 通信設備情報収集システム及び通信設備情報収集方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4829769U (ja) * 1971-08-13 1973-04-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4829769U (ja) * 1971-08-13 1973-04-12

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61220531A (ja) * 1985-03-26 1986-09-30 Tokyo Electric Power Co Inc:The 洞道内保安通信システム
JPH02290338A (ja) * 1989-01-18 1990-11-30 Hitachi Denshi Ltd 地下移動系と地上移動系との無線連絡通話方式
JPH07143631A (ja) * 1993-09-24 1995-06-02 Kansai Electric Power Co Inc:The 人孔内監視方法及び人孔内監視装置並びにそれに使用する伝送装置
JP2011154629A (ja) * 2010-01-28 2011-08-11 Nippon Telegr & Teleph Corp <Ntt> 通信設備情報収集システム及び通信設備情報収集方法

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