FR40772E - Improvements to electrical signaling systems - Google Patents

Improvements to electrical signaling systems

Info

Publication number
FR40772E
FR40772E FR40772DA FR40772E FR 40772 E FR40772 E FR 40772E FR 40772D A FR40772D A FR 40772DA FR 40772 E FR40772 E FR 40772E
Authority
FR
France
Prior art keywords
signaling systems
electrical signaling
electrical
systems
signaling
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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
Priority claimed from US378208A external-priority patent/US2248937A/en
Priority claimed from US445746A external-priority patent/US2103296A/en
Priority claimed from US497642A external-priority patent/US2096954A/en
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Application granted granted Critical
Publication of FR40772E publication Critical patent/FR40772E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1804—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast for stock exchange and similar applications
FR40772D 1929-07-15 1931-04-16 Improvements to electrical signaling systems Expired FR40772E (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US378208A US2248937A (en) 1929-07-15 1929-07-15 Transmitting and receiving system
US445746A US2103296A (en) 1930-04-19 1930-04-19 Transmitting and receiving system
US497642A US2096954A (en) 1929-07-15 1930-11-24 Stock quotation system

Publications (1)

Publication Number Publication Date
FR40772E true FR40772E (en) 1932-08-23

Family

ID=31999126

Family Applications (2)

Application Number Title Priority Date Filing Date
FR40771D Expired FR40771E (en) 1929-07-15 1931-04-15 Improvements to electrical signaling systems
FR40772D Expired FR40772E (en) 1929-07-15 1931-04-16 Improvements to electrical signaling systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR40771D Expired FR40771E (en) 1929-07-15 1931-04-15 Improvements to electrical signaling systems

Country Status (2)

Country Link
BE (1) BE379117A (en)
FR (2) FR40771E (en)

Also Published As

Publication number Publication date
FR40771E (en) 1932-08-23
BE379117A (en)

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