1670921

Information

• Patent Grant
• 1670921

• References
• Source

• Patent Number

  1,670,921

• Date Filed

  Not available

• Date Issued

  Tuesday, May 22, 1928
  97 years ago

• CPC

  • E05F11/36 - specially designed for passing through a wall
  • E05F11/14 - directly, i.e. without links, shifting the wing

• US Classifications

  • 049 - Movable or removable closures