JPH0461956U - - Google Patents
Info
- Publication number
- JPH0461956U JPH0461956U JP10540590U JP10540590U JPH0461956U JP H0461956 U JPH0461956 U JP H0461956U JP 10540590 U JP10540590 U JP 10540590U JP 10540590 U JP10540590 U JP 10540590U JP H0461956 U JPH0461956 U JP H0461956U
- Authority
- JP
- Japan
- Prior art keywords
- secret number
- corresponding predetermined
- predetermined secret
- call
- adds
- 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
Links
- 230000002265 prevention Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Prepayment Telephone Systems (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10540590U JP2530877Y2 (ja) | 1990-10-05 | 1990-10-05 | 無料発信防止システム |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10540590U JP2530877Y2 (ja) | 1990-10-05 | 1990-10-05 | 無料発信防止システム |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0461956U true JPH0461956U (nl) | 1992-05-27 |
JP2530877Y2 JP2530877Y2 (ja) | 1997-04-02 |
Family
ID=31851078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10540590U Expired - Lifetime JP2530877Y2 (ja) | 1990-10-05 | 1990-10-05 | 無料発信防止システム |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2530877Y2 (nl) |
-
1990
- 1990-10-05 JP JP10540590U patent/JP2530877Y2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2530877Y2 (ja) | 1997-04-02 |
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