3309017

Information

• Patent Grant
• 3309017

• References
• Source

• Patent Number

  3,309,017

• Date Filed

  Not available

• Date Issued

  Tuesday, March 14, 1967
  57 years ago

• CPC

  • G06G1/12 - Logarithmic graduations

• US Classifications

  • 235 - Registers
  • 434 - Education and demonstration