3451278

Information

• Patent Grant
• 3451278

• References
• Source

• Patent Number

  3,451,278

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1969
  55 years ago

• CPC

  • B43L13/00 - Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
  • B43L11/08 - for drawing involutes
  • G09B25/02 - of industrial processes of machinery
  • Y10T74/18312 - Grooved

• US Classifications

  • 074 - Machine element or mechanism
  • 033 - Geometrical instruments
  • 235 - Registers