FR686977A - Improvements to radiotelephone and similar systems - Google Patents

Improvements to radiotelephone and similar systems

Info

Publication number
FR686977A
FR686977A FR686977DA FR686977A FR 686977 A FR686977 A FR 686977A FR 686977D A FR686977D A FR 686977DA FR 686977 A FR686977 A FR 686977A
Authority
FR
France
Prior art keywords
radiotelephone
similar systems
systems
similar
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
Other languages
French (fr)
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of FR686977A publication Critical patent/FR686977A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Radio Relay Systems (AREA)
FR686977D 1929-05-09 1929-12-20 Improvements to radiotelephone and similar systems Expired FR686977A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37711/28A GB333262A (en) 1929-05-09 1929-05-09 Improvements in or relating to radio telephone and the like systems

Publications (1)

Publication Number Publication Date
FR686977A true FR686977A (en) 1930-08-01

Family

ID=10398463

Family Applications (1)

Application Number Title Priority Date Filing Date
FR686977D Expired FR686977A (en) 1929-05-09 1929-12-20 Improvements to radiotelephone and similar systems

Country Status (3)

Country Link
US (1) US2022357A (en)
FR (1) FR686977A (en)
GB (1) GB333262A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE755785C (en) * 1933-03-16 1952-03-31 Marconi Wireless Telegraph Co Arrangement for the automatic activation of a transmitter with the help of rectified modulation oscillations
DE747334C (en) * 1938-03-19 1944-12-04 Lorenz C Ag Method for saving power in high-frequency transmitters

Also Published As

Publication number Publication date
GB333262A (en) 1930-08-11
US2022357A (en) 1935-11-26

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