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
• • 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
  • H04M17/023—Circuit arrangements

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Computer Security & Cryptography (AREA)
• Signal Processing (AREA)
• Prepayment Telephone Systems (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=4541238

Family Applications (1)

Country Status (3)

• 0
  • BE BE462260D patent/BE462260A/xx unknown
• 1944
  • 1944-01-10 CH CH254410D patent/CH254410A/de unknown
• 1950
  • 1950-09-22 DE DEM6113A patent/DE840861C/de not_active Expired

Also Published As

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