1624280

Information

• Patent Grant
• 1624280

• References
• Source

• Patent Number

  1,624,280

• Date Filed

  Not available

• Date Issued

  Tuesday, April 12, 1927
  97 years ago

• CPC

  • B43L7/02 - T-squares and other similar squares
  • B43L7/08 - with arrangements for attaching additional drawing equipment
  • B43L9/007 - with perforated or marked rulers
  • B43L11/00 - Non-circular-curve-drawing instruments
  • B43L13/002 - Angle intersecting devices
  • B43L13/02 - Draughting machines or drawing devices for keeping parallelism
  • B43L13/24 - Devices for generating stepwise movements of drawing equipment

• US Classifications

  • 033 - Geometrical instruments