3131391

Information

• Patent Grant
• 3131391

• References
• Source

• Patent Number

  3,131,391

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1964
  60 years ago

• CPC

  • F41J9/04 - Seagoing targets
  • F41J2/00 - Reflecting targets

• US Classifications

  • 342 - Communications: directive radio wave systems and devices
  • 343 - Communications: radio wave antennas
  • 434 - Education and demonstration