FR1024329A - Improvements to two-way speakerphone systems - Google Patents

Improvements to two-way speakerphone systems

Info

Publication number
FR1024329A
FR1024329A FR1024329DA FR1024329A FR 1024329 A FR1024329 A FR 1024329A FR 1024329D A FR1024329D A FR 1024329DA FR 1024329 A FR1024329 A FR 1024329A
Authority
FR
France
Prior art keywords
speakerphone systems
way speakerphone
way
systems
speakerphone
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)
Inventor
Pierre Jeanlin
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 FR1024329A publication Critical patent/FR1024329A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
FR1024329D 1950-09-06 1950-09-06 Improvements to two-way speakerphone systems Expired FR1024329A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1024329T 1950-09-06

Publications (1)

Publication Number Publication Date
FR1024329A true FR1024329A (en) 1953-03-31

Family

ID=9578766

Family Applications (2)

Application Number Title Priority Date Filing Date
FR1024329D Expired FR1024329A (en) 1950-09-06 1950-09-06 Improvements to two-way speakerphone systems
FR61954D Expired FR61954E (en) 1950-09-06 1951-08-17 Improvements to two-way speakerphone systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR61954D Expired FR61954E (en) 1950-09-06 1951-08-17 Improvements to two-way speakerphone systems

Country Status (5)

Country Link
BE (1) BE505491A (en)
CH (1) CH305270A (en)
FR (2) FR1024329A (en)
GB (1) GB690720A (en)
LU (1) LU30955A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1129543B (en) * 1958-06-25 1962-05-17 Gylling & Co Ab Circuit arrangement for voice-controlled intercom systems

Also Published As

Publication number Publication date
CH305270A (en) 1955-02-15
GB690720A (en) 1953-04-29
FR61954E (en) 1955-06-01
BE505491A (en)
LU30955A1 (en)

Similar Documents

Publication Publication Date Title
FR1004582A (en) Improvements to transmission systems
FR1048082A (en) Improvements to distance indicating radio systems
FR1025940A (en) Improvements to automatic telephone systems
FR1013189A (en) Improvements to vehicle doors
FR995899A (en) Improvements to transmission systems
FR1024329A (en) Improvements to two-way speakerphone systems
FR1048765A (en) Improvements to automatic telecommunication systems
FR1015770A (en) Improvements to vehicle panels
FR1044739A (en) Improvements to transmission systems
FR1025462A (en) Improvements to lighting systems
FR1025939A (en) Improvements to telephone systems
FR1033649A (en) Improvements to television systems
FR1005731A (en) Improvements to two-sided speakerphone systems
FR1039854A (en) Improvements to unblocking systems
FR1023467A (en) Improvements to telephone systems
FR1025592A (en) Improvements to telephone systems
FR1017799A (en) Improvements to telephone systems
FR1023584A (en) Improvements to telephone systems
FR1022152A (en) Improvements to telephone systems
FR1110661A (en) Improvements to telecommunication systems
FR1054372A (en) Improvements to telecommunication systems
FR1013184A (en) Improvements to bearing systems for cycles
FR978603A (en) Improvements to telephone systems
FR967338A (en) Improvements to telephone systems
FR1002740A (en) Improvements to telemetry systems