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
Links
Landscapes
- Near-Field Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4829769U (ja) * | 1971-08-13 | 1973-04-12 |
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1974
- 1974-04-27 JP JP49048100A patent/JPS50140207A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4829769U (ja) * | 1971-08-13 | 1973-04-12 |
Cited By (4)
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 |