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CH243970A - Telephone set with back hearing loss. - Google Patents

Telephone set with back hearing loss.

Info

Publication number
CH243970A
CH243970A CH243970DA CH243970A CH 243970 A CH243970 A CH 243970A CH 243970D A CH243970D A CH 243970DA CH 243970 A CH243970 A CH 243970A
Authority
CH
Switzerland
Prior art keywords
telephone set
hearing loss
back hearing
loss
telephone
Prior art date
Application number
Other languages
German (de)
Inventor
Hasler Ag Praezisionsmechanik
Original Assignee
Hasler Ag
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 Hasler Ag filed Critical Hasler Ag
Publication of CH243970A publication Critical patent/CH243970A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
CH243970D 1944-09-23 1944-09-23 Telephone set with back hearing loss. CH243970A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH240690T 1944-09-23
CH243970T 1944-09-23

Publications (1)

Publication Number Publication Date
CH243970A true CH243970A (en) 1946-08-15

Family

ID=25728523

Family Applications (2)

Application Number Title Priority Date Filing Date
CH240690D CH240690A (en) 1944-09-23 1944-07-24 Telephone set with back hearing loss.
CH243970D CH243970A (en) 1944-09-23 1944-09-23 Telephone set with back hearing loss.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CH240690D CH240690A (en) 1944-09-23 1944-07-24 Telephone set with back hearing loss.

Country Status (1)

Country Link
CH (2) CH240690A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8319786D0 (en) * 1983-07-22 1983-08-24 Plessey Co Plc Adaptive line hybrids

Also Published As

Publication number Publication date
CH240690A (en) 1946-01-15

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