1494347

Information

• Patent Grant
• 1494347

• References
• Source

• Patent Number

  1,494,347

• Date Filed

  Not available

• Date Issued

  Tuesday, May 20, 1924
  101 years ago

• CPC

  • H04L13/184 - Photographic printing and recording

• US Classifications

  • 375 - Pulse or digital communications
  • 178 - Telegraphy