1898813

Information

• Patent Grant
• 1898813

• References
• Source

• Patent Number

  1,898,813

• Date Filed

  Not available

• Date Issued

  Tuesday, February 21, 1933
  92 years ago

• CPC

  • E04D13/0357 - the parts pivoting about an axis supported on a hinged frame or arms
  • F24F7/02 - Roof ventilation
  • F24F2011/0097 - opening air passage in case of fire, excessive heat or smoke

• US Classifications

  • 052 - Static structures