1980917

Information

• Patent Grant
• 1980917

• References
• Source

• Patent Number

  1,980,917

• Date Filed

  Not available

• Date Issued

  Tuesday, November 13, 1934
  90 years ago

• CPC

  • B43L5/002 - with pivoting drawing surface
  • B43L11/00 - Non-circular-curve-drawing instruments

• US Classifications

  • 033 - Geometrical instruments