1237636

Information

• Patent Grant
• 1237636

• References
• Source

• Patent Number

  1,237,636

• Date Filed

  Not available

• Date Issued

  Tuesday, August 21, 1917
  107 years ago

• CPC

  • B43L1/08 - flexible

• US Classifications

  • 434 - Education and demonstration
  • 040 - Card, picture, or sign exhibiting