3487811

Information

• Patent Grant
• 3487811

• References
• Source

• Patent Number

  3,487,811

• Date Filed

  Not available

• Date Issued

  Tuesday, January 6, 1970
  55 years ago

• CPC

  • G10K1/0645 - provided with loudness adjustment

• US Classifications

  • 116 - Signals and indicators
  • 188 - Brakes