1668631

Information

• Patent Grant
• 1668631

• References
• Source

• Patent Number

  1,668,631

• Date Filed

  Not available

• Date Issued

  Tuesday, May 8, 1928
  96 years ago

• CPC

  • E05F13/04 - by platforms lowered by the weight of the user
  • E05F1/02 - gravity-actuated
  • E05F1/046 - with rectilinearly-inclined tracks for sliding wings
  • E05Y2900/106 - for garages

• US Classifications

  • 049 - Movable or removable closures