JPS51139708A - Interphone at noisy places - Google Patents

Interphone at noisy places

Info

Publication number
JPS51139708A
JPS51139708A JP6386575A JP6386575A JPS51139708A JP S51139708 A JPS51139708 A JP S51139708A JP 6386575 A JP6386575 A JP 6386575A JP 6386575 A JP6386575 A JP 6386575A JP S51139708 A JPS51139708 A JP S51139708A
Authority
JP
Japan
Prior art keywords
interphone
noisy places
noisy
places
calling
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
JP6386575A
Other languages
Japanese (ja)
Inventor
Akio Shimozaka
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP6386575A priority Critical patent/JPS51139708A/en
Publication of JPS51139708A publication Critical patent/JPS51139708A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PURPOSE:An interphone usable for the calling at noisy places.
JP6386575A 1975-05-28 1975-05-28 Interphone at noisy places Pending JPS51139708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6386575A JPS51139708A (en) 1975-05-28 1975-05-28 Interphone at noisy places

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6386575A JPS51139708A (en) 1975-05-28 1975-05-28 Interphone at noisy places

Publications (1)

Publication Number Publication Date
JPS51139708A true JPS51139708A (en) 1976-12-02

Family

ID=13241624

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6386575A Pending JPS51139708A (en) 1975-05-28 1975-05-28 Interphone at noisy places

Country Status (1)

Country Link
JP (1) JPS51139708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07270100A (en) * 1994-03-31 1995-10-20 Babcock Hitachi Kk Shooting trainer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07270100A (en) * 1994-03-31 1995-10-20 Babcock Hitachi Kk Shooting trainer

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