3898609

Information

• Patent Grant
• 3898609

• References
• Source

• Patent Number

  3,898,609

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1975
  50 years ago

• CPC

  • G08B5/40 - using smoke, fire or coloured gases

• US Classifications

  • 340 - Communications: electrical
  • 102 - Ammunition and explosives
  • 441 - Buoys, rafts, and aquatic devices