2031686

Information

• Patent Grant
• 2031686

• References
• Source

• Patent Number

  2,031,686

• Date Filed

  Not available

• Date Issued

  Tuesday, February 25, 1936
  89 years ago

• CPC

  • G06F7/463 - by successive additions or subtractions

• US Classifications

  • 234 - Selective cutting
  • 346 - Recorders