3678477

Information

• Patent Grant
• 3678477

• References
• Source

• Patent Number

  3,678,477

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1972
  52 years ago

• CPC

  • H04M1/278 - using punched cards or tapes

• US Classifications

  • 365 - Static information storage and retrieval
  • 235 - Registers