1972274

Information

• Patent Grant
• 1972274

• References
• Source

• Patent Number

  1,972,274

• Date Filed

  Not available

• Date Issued

  Tuesday, September 4, 1934
  90 years ago

• CPC

  • E06B7/06 - with one ventilation wing only
  • E06B2009/528 - Screens extending between movable wing and fixed frame of window or door

• US Classifications

  • 454 - Ventilation