3140648

Information

• Patent Grant
• 3140648

• References
• Source

• Patent Number

  3,140,648

• Date Filed

  Not available

• Date Issued

  Tuesday, July 14, 1964
  60 years ago

• CPC

  • F16K17/006 - specially adapted for shelters
  • A62B13/00 - Special devices for ventilating gasproof shelters
  • Y10S454/902 - Air raid shelter ventilation

• US Classifications

  • 454 - Ventilation