3489073

Information

• Patent Grant
• 3489073

• References
• Source

• Patent Number

  3,489,073

• Date Filed

  Not available

• Date Issued

  Tuesday, January 13, 1970
  55 years ago

• CPC

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

• US Classifications

  • 454 - Ventilation