1443520

Information

• Patent Grant
• 1443520

• References
• Source

• Patent Number

  1,443,520

• Date Filed

  Not available

• Date Issued

  Tuesday, January 30, 1923
  102 years ago

• CPC

  • B42D5/04 - Calendar blocks
  • B42D5/065 - having plural perforation lines

• US Classifications

  • 283 - Printed matter