4893000

Information

• Patent Grant
• 4893000

• References
• Source

• Patent Number

  4,893,000

• Date Filed

  Not available

• Date Issued

  Tuesday, January 9, 1990
  35 years ago

• CPC

  • G07F7/0866 - by active credit-cards adapted therefor
  • G06Q20/363 - with the personal data files for a user
  • G07B17/00024 - Physical or organizational aspects of franking systems
  • G07B17/0008 - Communication details outside or between apparatus
  • G07B2017/00177 - from a portable device
  • G07B2017/00758 - Asymmetric, public-key algorithms
  • G07B2017/0087 - Key distribution