FR779397A - Improvement in telephony - Google Patents

Improvement in telephony

Info

Publication number
FR779397A
FR779397A FR779397DA FR779397A FR 779397 A FR779397 A FR 779397A FR 779397D A FR779397D A FR 779397DA FR 779397 A FR779397 A FR 779397A
Authority
FR
France
Prior art keywords
telephony
improvement
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.)
LE TELEPHONE PRIVE NAT
Original Assignee
LE TELEPHONE PRIVE NAT
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 LE TELEPHONE PRIVE NAT filed Critical LE TELEPHONE PRIVE NAT
Application granted granted Critical
Publication of FR779397A publication Critical patent/FR779397A/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)
FR779397D 1933-12-30 1933-12-30 Improvement in telephony Expired FR779397A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR779398T 1933-12-30

Publications (1)

Publication Number Publication Date
FR779397A true FR779397A (en) 1935-04-03

Family

ID=9202754

Family Applications (2)

Application Number Title Priority Date Filing Date
FR779397D Expired FR779397A (en) 1933-12-30 1933-12-30 Improvement in telephony
FR779398D Expired FR779398A (en) 1933-12-30 1933-12-30 Telephony improvement

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR779398D Expired FR779398A (en) 1933-12-30 1933-12-30 Telephony improvement

Country Status (2)

Country Link
FR (2) FR779397A (en)
NL (1) NL42655C (en)

Also Published As

Publication number Publication date
FR779398A (en) 1935-04-03
NL42655C (en)

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