JPS52121940A - Automatic door closer - Google Patents

Automatic door closer

Info

Publication number
JPS52121940A
JPS52121940A JP3861276A JP3861276A JPS52121940A JP S52121940 A JPS52121940 A JP S52121940A JP 3861276 A JP3861276 A JP 3861276A JP 3861276 A JP3861276 A JP 3861276A JP S52121940 A JPS52121940 A JP S52121940A
Authority
JP
Japan
Prior art keywords
automatic door
door closer
closer
automatic
door
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.)
Pending
Application number
JP3861276A
Other languages
Japanese (ja)
Inventor
Enzou Demukai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Door Check Manufacturing Co Ltd
Original Assignee
Nippon Door Check Manufacturing Co Ltd
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 Nippon Door Check Manufacturing Co Ltd filed Critical Nippon Door Check Manufacturing Co Ltd
Priority to JP3861276A priority Critical patent/JPS52121940A/en
Publication of JPS52121940A publication Critical patent/JPS52121940A/en
Pending legal-status Critical Current

Links

JP3861276A 1976-04-05 1976-04-05 Automatic door closer Pending JPS52121940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3861276A JPS52121940A (en) 1976-04-05 1976-04-05 Automatic door closer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3861276A JPS52121940A (en) 1976-04-05 1976-04-05 Automatic door closer

Publications (1)

Publication Number Publication Date
JPS52121940A true JPS52121940A (en) 1977-10-13

Family

ID=12530076

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3861276A Pending JPS52121940A (en) 1976-04-05 1976-04-05 Automatic door closer

Country Status (1)

Country Link
JP (1) JPS52121940A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9995076B1 (en) 2001-07-13 2018-06-12 Steven M. Hoffberg Intelligent door restraint

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4871047A (en) * 1971-12-28 1973-09-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4871047A (en) * 1971-12-28 1973-09-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9995076B1 (en) 2001-07-13 2018-06-12 Steven M. Hoffberg Intelligent door restraint

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