3467825

Information

• Patent Grant
• 3467825

• References
• Source

• Patent Number

  3,467,825

• Date Filed

  Not available

• Date Issued

  Tuesday, September 16, 1969
  55 years ago

• CPC

  • G07C9/00055 - visually

• US Classifications

  • 250 - Radiant energy
  • 283 - Printed matter