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)
• Testing Of Coins (AREA)
• Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
• Prepayment Telephone Systems (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=34559099

Family Applications (1)

Country Status (6)

• 0
  • BE BE383059D patent/BE383059A/xx unknown
  • NL NL32935D patent/NL32935C/xx active
• 1930
  • 1930-10-12 DE DE1930565906D patent/DE565906C/de not_active Expired
• 1931
  • 1931-09-28 FR FR723681D patent/FR723681A/fr not_active Expired
  • 1931-09-29 AT AT130160D patent/AT130160B/de active
  • 1931-09-30 GB GB2726731A patent/GB376105A/en not_active Expired

Also Published As

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