1978554

Information

• Patent Grant
• 1978554

• References
• Source

• Patent Number

  1,978,554

• Date Filed

  Not available

• Date Issued

  Tuesday, October 30, 1934
  90 years ago

• CPC

  • B41K3/126 - Numbering devices
  • B41K3/125 - having automatic means for changing type-characters

• US Classifications

  • 101 - Printing
  • 200 - Electricity: circuit makers and breakers