1869951

Information

• Patent Grant
• 1869951

• References
• Source

• Patent Number

  1,869,951

• Date Filed

  Not available

• Date Issued

  Tuesday, August 2, 1932
  93 years ago

• CPC

  • B43L11/005 - pendulum-actuated

• US Classifications

  • 033 - Geometrical instruments
  • 346 - Recorders
  • 434 - Education and demonstration