1793700

Information

• Patent Grant
• 1793700

• References
• Source

• Patent Number

  1,793,700

• Date Filed

  Not available

• Date Issued

  Tuesday, February 24, 1931
  94 years ago

• CPC

  • H04L25/46 - using tuning forks or vibrating reeds

• US Classifications

  • 178 - Telegraphy
  • 370 - Multiplex communications