3487210

Information

• Patent Grant
• 3487210

• References
• Source

• Patent Number

  3,487,210

• Date Filed

  Not available

• Date Issued

  Tuesday, December 30, 1969
  55 years ago

• CPC

  • G07C9/00055 - visually

• US Classifications

  • 250 - Radiant energy
  • 283 - Printed matter