2978172

Information

• Patent Grant
• 2978172

• References
• Source

• Patent Number

  2,978,172

• Date Filed

  Not available

• Date Issued

  Tuesday, April 4, 1961
  63 years ago

• CPC

  • G06C23/06 - of tabulation devices

• US Classifications

  • 235 - Registers
  • 400 - Typewriting machines