GB191209179A - Improvements in and relating to Telephony. - Google Patents

Improvements in and relating to Telephony.

Info

Publication number
GB191209179A
GB191209179A GB191209179DA GB191209179A GB 191209179 A GB191209179 A GB 191209179A GB 191209179D A GB191209179D A GB 191209179DA GB 191209179 A GB191209179 A GB 191209179A
Authority
GB
United Kingdom
Prior art keywords
telephony
relating
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
Sidney George Brown
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 GB191209179A publication Critical patent/GB191209179A/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)
GB191209179D 1912-04-18 1912-04-18 Improvements in and relating to Telephony. Expired GB191209179A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191209179T 1912-04-18

Publications (1)

Publication Number Publication Date
GB191209179A true GB191209179A (en) 1913-04-17

Family

ID=32571836

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191209179D Expired GB191209179A (en) 1912-04-18 1912-04-18 Improvements in and relating to Telephony.

Country Status (2)

Country Link
FR (1) FR457870A (en)
GB (1) GB191209179A (en)

Also Published As

Publication number Publication date
FR457870A (en) 1913-09-27

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