1018645

Information

• Patent Grant
• 1018645

• References
• Source

• Patent Number

  1,018,645

• Date Filed

  Not available

• Date Issued

  Tuesday, February 27, 1912
  112 years ago

• CPC

  • G09B9/304 - by using a film

• US Classifications

  • 434 - Education and demonstration
  • 472 - Amusement devices