3581401

Information

• Patent Grant
• 3581401

• References
• Source

• Patent Number

  3,581,401

• Date Filed

  Not available

• Date Issued

  Tuesday, June 1, 1971
  53 years ago

• CPC

  • G01B3/02 - Rulers or tapes with scales or marks for direct reading
  • B43L13/022 - automatic
  • B43L13/24 - Devices for generating stepwise movements of drawing equipment
  • G01D18/00 - Testing or calibrating of apparatus or arrangements provided for in groups G01D1/00 - G01D15/00

• US Classifications

  • 033 - Geometrical instruments