GB191317038A - Improvements in and relating to Telephone Systems. - Google Patents

Improvements in and relating to Telephone Systems.

Info

Publication number
GB191317038A
GB191317038A GB191317038DA GB191317038A GB 191317038 A GB191317038 A GB 191317038A GB 191317038D A GB191317038D A GB 191317038DA GB 191317038 A GB191317038 A GB 191317038A
Authority
GB
United Kingdom
Prior art keywords
relating
telephone systems
telephone
systems
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.)
Expired
Application number
Inventor
Knut Erik Ericsson
Gustaf Wilhelm Dahlstroem
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
Application granted granted Critical
Publication of GB191317038A publication Critical patent/GB191317038A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F13/00—Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
GB191317038D 1912-07-26 1913-07-24 Improvements in and relating to Telephone Systems. Expired GB191317038A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE191317038X 1912-07-26

Publications (1)

Publication Number Publication Date
GB191317038A true GB191317038A (en) 1914-07-24

Family

ID=32391091

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191317038D Expired GB191317038A (en) 1912-07-26 1913-07-24 Improvements in and relating to Telephone Systems.

Country Status (1)

Country Link
GB (1) GB191317038A (en)

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