1541795

Information

• Patent Grant
• 1541795

• References
• Source

• Patent Number

  1,541,795

• Date Filed

  Not available

• Date Issued

  Tuesday, June 16, 1925
  99 years ago

• CPC

  • G09B1/14 - the elements being slidably mounted on the support

• US Classifications

  • 434 - Education and demonstration