FR487961A - Improvements to paid service telephone systems - Google Patents

Improvements to paid service telephone systems

Info

Publication number
FR487961A
FR487961A FR487961A FR487961DA FR487961A FR 487961 A FR487961 A FR 487961A FR 487961 A FR487961 A FR 487961A FR 487961D A FR487961D A FR 487961DA FR 487961 A FR487961 A FR 487961A
Authority
FR
France
Prior art keywords
telephone systems
paid service
service telephone
paid
systems
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
FR487961A
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR487961A publication Critical patent/FR487961A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Prepayment Telephone Systems (AREA)
FR487961A 1916-12-15 1917-12-12 Improvements to paid service telephone systems Expired FR487961A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US137161A US1349373A (en) 1916-12-15 1916-12-15 Measured-service telephone system

Publications (1)

Publication Number Publication Date
FR487961A true FR487961A (en) 1918-08-09

Family

ID=22476073

Family Applications (1)

Application Number Title Priority Date Filing Date
FR487961A Expired FR487961A (en) 1916-12-15 1917-12-12 Improvements to paid service telephone systems

Country Status (2)

Country Link
US (1) US1349373A (en)
FR (1) FR487961A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL278487A (en) * 1962-05-16

Also Published As

Publication number Publication date
US1349373A (en) 1920-08-10

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