FR40774E - Improvements to electrical signaling systems - Google Patents

Improvements to electrical signaling systems

Info

Publication number
FR40774E
FR40774E FR40774DA FR40774E FR 40774 E FR40774 E FR 40774E FR 40774D A FR40774D A FR 40774DA FR 40774 E FR40774 E FR 40774E
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 US462114A external-priority patent/US2217029A/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 FR40774E publication Critical patent/FR40774E/en
Priority claimed from US254120A external-priority patent/US2234684A/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
FR40774D 1929-07-15 1931-06-16 Improvements to electrical signaling systems Expired FR40774E (en)

Applications Claiming Priority (5)

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
US462114A US2217029A (en) 1930-06-18 1930-06-18 Stock quotation system
US497642A US2096954A (en) 1929-07-15 1930-11-24 Stock quotation system
US254120A US2234684A (en) 1930-06-18 1939-02-01 Stock quotation system

Publications (1)

Publication Number Publication Date
FR40774E true FR40774E (en) 1932-08-23

Family

ID=32074769

Family Applications (2)

Application Number Title Priority Date Filing Date
FR40774D Expired FR40774E (en) 1929-07-15 1931-06-16 Improvements to electrical signaling systems
FR41030D Expired FR41030E (en) 1929-07-15 1931-06-17

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR41030D Expired FR41030E (en) 1929-07-15 1931-06-17

Country Status (1)

Country Link
FR (2) FR40774E (en)

Also Published As

Publication number Publication date
FR41030E (en) 1932-09-17

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