3789420

Information

• Patent Grant
• 3789420

• References
• Source

• Patent Number

  3,789,420

• Date Filed

  Not available

• Date Issued

  Tuesday, January 29, 1974
  50 years ago

• CPC

  • B41M5/283 - Inorganic thermochromic compounds
  • G11C13/048 - using other optical storage elements

• US Classifications

  • 347 - Incremental printing of symbolic information
  • 346 - Recorders
  • 359 - Optical: systems and elements
  • 365 - Static information storage and retrieval