GB542827A - Improvements in or relating to telephone exchange systems - Google Patents

Improvements in or relating to telephone exchange systems

Info

Publication number
GB542827A
GB542827A GB764/41A GB76441A GB542827A GB 542827 A GB542827 A GB 542827A GB 764/41 A GB764/41 A GB 764/41A GB 76441 A GB76441 A GB 76441A GB 542827 A GB542827 A GB 542827A
Authority
GB
United Kingdom
Prior art keywords
relay
tubes
lamps
tube
group
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
GB764/41A
Other languages
English (en)
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB542827A publication Critical patent/GB542827A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
GB764/41A 1930-01-23 1941-01-20 Improvements in or relating to telephone exchange systems Expired GB542827A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US542827XA 1930-01-23 1930-01-23

Publications (1)

Publication Number Publication Date
GB542827A true GB542827A (en) 1942-01-28

Family

ID=21989978

Family Applications (1)

Application Number Title Priority Date Filing Date
GB764/41A Expired GB542827A (en) 1930-01-23 1941-01-20 Improvements in or relating to telephone exchange systems

Country Status (2)

Country Link
GB (1) GB542827A (es)
NL (1) NL61603C (es)

Also Published As

Publication number Publication date
NL61603C (es)

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