KR900008898U - Door opening and closing alarm device - Google Patents

Door opening and closing alarm device

Info

Publication number
KR900008898U
KR900008898U KR2019880016853U KR880016853U KR900008898U KR 900008898 U KR900008898 U KR 900008898U KR 2019880016853 U KR2019880016853 U KR 2019880016853U KR 880016853 U KR880016853 U KR 880016853U KR 900008898 U KR900008898 U KR 900008898U
Authority
KR
South Korea
Prior art keywords
door opening
alarm device
closing alarm
closing
door
Prior art date
Application number
KR2019880016853U
Other languages
Korean (ko)
Other versions
KR910005324Y1 (en
Inventor
이효균
서강석
Original Assignee
이효균
서강석
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 이효균, 서강석 filed Critical 이효균
Priority to KR2019880016853U priority Critical patent/KR910005324Y1/en
Publication of KR900008898U publication Critical patent/KR900008898U/en
Application granted granted Critical
Publication of KR910005324Y1 publication Critical patent/KR910005324Y1/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
KR2019880016853U 1988-10-15 1988-10-15 Device which alarms in opening or closing door KR910005324Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880016853U KR910005324Y1 (en) 1988-10-15 1988-10-15 Device which alarms in opening or closing door

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880016853U KR910005324Y1 (en) 1988-10-15 1988-10-15 Device which alarms in opening or closing door

Publications (2)

Publication Number Publication Date
KR900008898U true KR900008898U (en) 1990-05-03
KR910005324Y1 KR910005324Y1 (en) 1991-07-22

Family

ID=19280273

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019880016853U KR910005324Y1 (en) 1988-10-15 1988-10-15 Device which alarms in opening or closing door

Country Status (1)

Country Link
KR (1) KR910005324Y1 (en)

Also Published As

Publication number Publication date
KR910005324Y1 (en) 1991-07-22

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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