2216420

Information

• Patent Grant
• 2216420

• References
• Source

• Patent Number

  2,216,420

• Date Filed

  Not available

• Date Issued

  Tuesday, October 1, 1940
  84 years ago

• CPC

  • E06B7/04 - with ventilation wings
  • F24F13/082 - Grilles, registers or guards

• US Classifications

  • 454 - Ventilation
  • 049 - Movable or removable closures
  • 256 - Fences
  • D25 - Building units and construction elements