1937504

Information

• Patent Grant
• 1937504

• References
• Source

• Patent Number

  1,937,504

• Date Filed

  Not available

• Date Issued

  Tuesday, December 5, 1933
  91 years ago

• CPC

  • B63B51/02 - with anchored light-ships by use of lighthouses

• US Classifications

  • 359 - Optical: systems and elements
  • 116 - Signals and indicators