FR337981A - Appareil de controle pour postes téléphoniques, caisses et autres usages - Google Patents

Appareil de controle pour postes téléphoniques, caisses et autres usages

Info

Publication number
FR337981A
FR337981A FR337981A FR337981DA FR337981A FR 337981 A FR337981 A FR 337981A FR 337981 A FR337981 A FR 337981A FR 337981D A FR337981D A FR 337981DA FR 337981 A FR337981 A FR 337981A
Authority
FR
France
Prior art keywords
telephones
control device
cash registers
cash
registers
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
FR337981A
Other languages
English (en)
French (fr)
Inventor
Eugen Speyer
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.)
EUGEN SPEYER
Original Assignee
EUGEN SPEYER
Filing date
Publication date
Application filed by EUGEN SPEYER filed Critical EUGEN SPEYER
Application granted granted Critical
Publication of FR337981A publication Critical patent/FR337981A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/667—Preventing unauthorised calls from a telephone set

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Casings For Electric Apparatus (AREA)
FR337981A 1903-12-23 Appareil de controle pour postes téléphoniques, caisses et autres usages Expired FR337981A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE151465T

Publications (1)

Publication Number Publication Date
FR337981A true FR337981A (fr) 1904-05-04

Family

ID=5674488

Family Applications (1)

Application Number Title Priority Date Filing Date
FR337981A Expired FR337981A (fr) 1903-12-23 Appareil de controle pour postes téléphoniques, caisses et autres usages

Country Status (2)

Country Link
DE (1) DE151465C (enrdf_load_stackoverflow)
FR (1) FR337981A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE151465C (enrdf_load_stackoverflow)

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