3509331

Information

• Patent Grant
• 3509331

• References
• Source

• Patent Number

  3,509,331

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1970
  54 years ago

• CPC

  • G06F7/4912 - Adding; Subtracting
  • E21B19/04 - Hooks
  • G06Q20/20 - Point-of-sale [POS] network systems
  • G06F2207/4919 - Using excess-3 code

• US Classifications

  • 705 - Data processing: financial, business practice, management, or cost/price determination