3831318

Information

• Patent Grant
• 3831318

• References
• Source

• Patent Number

  3,831,318

• Date Filed

  Not available

• Date Issued

  Tuesday, August 27, 1974
  50 years ago

• CPC

  • E21F5/14 - Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions

• US Classifications

  • 049 - Movable or removable closures
  • 073 - Measuring and testing
  • 169 - Fire extinguishers
  • 340 - Communications: electrical