2499518

Information

• Patent Grant
• 2499518

• References
• Source

• Patent Number

  2,499,518

• Date Filed

  Not available

• Date Issued

  Tuesday, March 7, 1950
  75 years ago

• CPC

  • B43L9/002 - with perforated or marked discs

• US Classifications

  • 033 - Geometrical instruments