3249933

Information

• Patent Grant
• 3249933

• References
• Source

• Patent Number

  3,249,933

• Date Filed

  Not available

• Date Issued

  Tuesday, May 3, 1966
  59 years ago

• CPC

  • G08B3/10 - using electric transmission using electromagnetic transmission
  • B61L5/20 - Audible signals

• US Classifications

  • 340 - Communications: electrical