1973645

Information

• Patent Grant
• 1973645

• References
• Source

• Patent Number

  1,973,645

• Date Filed

  Not available

• Date Issued

  Tuesday, September 11, 1934
  90 years ago

• CPC

  • E06B7/04 - with ventilation wings

• US Classifications

  • 049 - Movable or removable closures
  • 454 - Ventilation