JPS539199Y2 - - Google Patents

Info

Publication number
JPS539199Y2
JPS539199Y2 JP4180175U JP4180175U JPS539199Y2 JP S539199 Y2 JPS539199 Y2 JP S539199Y2 JP 4180175 U JP4180175 U JP 4180175U JP 4180175 U JP4180175 U JP 4180175U JP S539199 Y2 JPS539199 Y2 JP S539199Y2
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.)
Expired
Application number
JP4180175U
Other languages
Japanese (ja)
Other versions
JPS51123796U (enrdf_load_stackoverflow
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 filed Critical
Priority to JP4180175U priority Critical patent/JPS539199Y2/ja
Publication of JPS51123796U publication Critical patent/JPS51123796U/ja
Application granted granted Critical
Publication of JPS539199Y2 publication Critical patent/JPS539199Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Respiratory Apparatuses And Protective Means (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
JP4180175U 1975-03-28 1975-03-28 Expired JPS539199Y2 (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4180175U JPS539199Y2 (enrdf_load_stackoverflow) 1975-03-28 1975-03-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4180175U JPS539199Y2 (enrdf_load_stackoverflow) 1975-03-28 1975-03-28

Publications (2)

Publication Number Publication Date
JPS51123796U JPS51123796U (enrdf_load_stackoverflow) 1976-10-06
JPS539199Y2 true JPS539199Y2 (enrdf_load_stackoverflow) 1978-03-10

Family

ID=28169892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4180175U Expired JPS539199Y2 (enrdf_load_stackoverflow) 1975-03-28 1975-03-28

Country Status (1)

Country Link
JP (1) JPS539199Y2 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9517366B2 (en) * 2013-02-01 2016-12-13 3M Innovative Properties Company Respirator mask speech enhancement apparatus and method

Also Published As

Publication number Publication date
JPS51123796U (enrdf_load_stackoverflow) 1976-10-06

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