2904251

Information

• Patent Grant
• 2904251

• References
• Source

• Patent Number

  2,904,251

• Date Filed

  Not available

• Date Issued

  Tuesday, September 15, 1959
  65 years ago

• CPC

  • G06M3/022 - by subtracting
  • G06M3/021 - with drums type indicating means
  • G06M3/024 - by adding

• US Classifications

  • 235 - Registers