3333242

Information

• Patent Grant
• 3333242

• References
• Source

• Patent Number

  3,333,242

• Date Filed

  Not available

• Date Issued

  Tuesday, July 25, 1967
  57 years ago

• CPC

  • B60C23/0469 - Transmission by sound

• US Classifications

  • 340 - Communications: electrical
  • 116 - Signals and indicators