KR880015467U - 전화기의 버튼 잠금 장치 - Google Patents

전화기의 버튼 잠금 장치

Info

Publication number
KR880015467U
KR880015467U KR2019870000133U KR870000133U KR880015467U KR 880015467 U KR880015467 U KR 880015467U KR 2019870000133 U KR2019870000133 U KR 2019870000133U KR 870000133 U KR870000133 U KR 870000133U KR 880015467 U KR880015467 U KR 880015467U
Authority
KR
South Korea
Prior art keywords
phone
button lock
button
lock
Prior art date
Application number
KR2019870000133U
Other languages
English (en)
Other versions
KR900001396Y1 (ko
Inventor
공진
Original Assignee
박정식
공진
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 박정식, 공진 filed Critical 박정식
Priority to KR2019870000133U priority Critical patent/KR900001396Y1/ko
Publication of KR880015467U publication Critical patent/KR880015467U/ko
Application granted granted Critical
Publication of KR900001396Y1 publication Critical patent/KR900001396Y1/ko

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/66Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/667Preventing unauthorised calls from a telephone set
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Casings For Electric Apparatus (AREA)
KR2019870000133U 1987-01-09 1987-01-09 전화기의 버튼 잠금 장치 KR900001396Y1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870000133U KR900001396Y1 (ko) 1987-01-09 1987-01-09 전화기의 버튼 잠금 장치

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870000133U KR900001396Y1 (ko) 1987-01-09 1987-01-09 전화기의 버튼 잠금 장치

Publications (2)

Publication Number Publication Date
KR880015467U true KR880015467U (ko) 1988-09-15
KR900001396Y1 KR900001396Y1 (ko) 1990-02-26

Family

ID=19258908

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019870000133U KR900001396Y1 (ko) 1987-01-09 1987-01-09 전화기의 버튼 잠금 장치

Country Status (1)

Country Link
KR (1) KR900001396Y1 (ko)

Also Published As

Publication number Publication date
KR900001396Y1 (ko) 1990-02-26

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Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
NORF Unpaid initial registration fee