1400838

Information

• Patent Grant
• 1400838

• References
• Source

• Patent Number

  1,400,838

• Date Filed

  Not available

• Date Issued

  Tuesday, December 20, 1921
  103 years ago

• CPC

  • A63H33/22 - Optical, colour, or shadow toys
  • B43L5/002 - with pivoting drawing surface
  • B43L11/00 - Non-circular-curve-drawing instruments

• US Classifications

  • 033 - Geometrical instruments
  • D10 - Measuring, testing, or signalling instruments