2181830

Information

• Patent Grant
• 2181830

• References
• Source

• Patent Number

  2,181,830

• Date Filed

  Not available

• Date Issued

  Tuesday, November 28, 1939
  85 years ago

• CPC

  • B43K1/01 - with ink reservoirs
  • G01K1/02 - Special applications of indicating or recording means
  • G01L19/10 - mechanical

• US Classifications

  • 346 - Recorders
  • 033 - Geometrical instruments