2633220

Information

• Patent Grant
• 2633220

• References
• Source

• Patent Number

  2,633,220

• Date Filed

  Not available

• Date Issued

  Tuesday, March 31, 1953
  71 years ago

• CPC

  • G06C23/06 - of tabulation devices

• US Classifications

  • 192 - Clutches and power-stop control
  • 235 - Registers
  • 246 - Railway switches and signals