3231191

Information

• Patent Grant
• 3231191

• References
• Source

• Patent Number

  3,231,191

• Date Filed

  Not available

• Date Issued

  Tuesday, January 25, 1966
  59 years ago

• CPC

  • G06M3/022 - by subtracting
  • G06M3/024 - by adding

• US Classifications

  • 235 - Registers