3878615

Information

• Patent Grant
• 3878615

• References
• Source

• Patent Number

  3,878,615

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1975
  49 years ago

• CPC

  • B43L7/125 - Comprising at least two straightedges remaining parallel
  • B43L7/14 - Square and sliding straight edges
  • Y10S33/09 - Rectangular proportioner

• US Classifications

  • 033 - Geometrical instruments