3621808

Information

• Patent Grant
• 3621808

• References
• Source

• Patent Number

  3,621,808

• Date Filed

  Not available

• Date Issued

  Tuesday, November 23, 1971
  52 years ago

• CPC

  • B60C23/085 - putting directly into action an audible signal

• US Classifications

  • 116 - Signals and indicators