US2293191A - Telephone system - Google Patents

Telephone system Download PDF

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Publication number
US2293191A
US2293191A US295012A US29501239A US2293191A US 2293191 A US2293191 A US 2293191A US 295012 A US295012 A US 295012A US 29501239 A US29501239 A US 29501239A US 2293191 A US2293191 A US 2293191A
Authority
US
United States
Prior art keywords
busch
telephone system
sheet
sheets
filed sept
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 - Lifetime
Application number
US295012A
Other languages
English (en)
Inventor
Aloysius J Busch
Frederick J Scudder
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories 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
Priority to NL137222D priority Critical patent/NL137222B/xx
Priority to NL70954D priority patent/NL70954C/xx
Priority to FR962198D priority patent/FR962198A/fr
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US295012A priority patent/US2293191A/en
Application granted granted Critical
Publication of US2293191A publication Critical patent/US2293191A/en
Priority to GB5088/48A priority patent/GB653002A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Adhesives Or Adhesive Processes (AREA)
US295012A 1939-09-15 1939-09-15 Telephone system Expired - Lifetime US2293191A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL137222D NL137222B (en)) 1939-09-15
NL70954D NL70954C (en)) 1939-09-15
FR962198D FR962198A (en)) 1939-09-15
US295012A US2293191A (en) 1939-09-15 1939-09-15 Telephone system
GB5088/48A GB653002A (en) 1939-09-15 1948-02-20 Improvements in or relating to telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US295012A US2293191A (en) 1939-09-15 1939-09-15 Telephone system

Publications (1)

Publication Number Publication Date
US2293191A true US2293191A (en) 1942-08-18

Family

ID=23135853

Family Applications (1)

Application Number Title Priority Date Filing Date
US295012A Expired - Lifetime US2293191A (en) 1939-09-15 1939-09-15 Telephone system

Country Status (4)

Country Link
US (1) US2293191A (en))
FR (1) FR962198A (en))
GB (1) GB653002A (en))
NL (2) NL70954C (en))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465539A (en) * 1946-12-20 1949-03-29 Bell Telephone Labor Inc Call failure signaling arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465539A (en) * 1946-12-20 1949-03-29 Bell Telephone Labor Inc Call failure signaling arrangement

Also Published As

Publication number Publication date
NL137222B (en))
FR962198A (en)) 1950-06-02
GB653002A (en) 1951-05-09
NL70954C (en))

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