2291108

Information

• Patent Grant
• 2291108

• References
• Source

• Patent Number

  2,291,108

• Date Filed

  Not available

• Date Issued

  Tuesday, July 28, 1942
  82 years ago

• CPC

  • H04L15/285 - Telegraph sounders; Apparatus for acoustic reception

• US Classifications

  • 178 - Telegraphy
  • 181 - Acoustics
  • 340 - Communications: electrical
  • 367 - Communications, electrical: acoustic wave systems and devices