3663990

Information

• Patent Grant
• 3663990

• References
• Source

• Patent Number

  3,663,990

• Date Filed

  Not available

• Date Issued

  Tuesday, May 23, 1972
  52 years ago

• CPC

  • E05D1/04 - with guide members shaped as circular arcs
  • F21S8/033 - the surface being a wall or like vertical structure
  • F21V17/107 - using hinge joints
  • F21Y2103/00 - Elongated light sources
  • Y10T16/53625 - Hook to hook
  • Y10T16/5408 - by shifting hinged members
  • Y10T16/542 - comprising nested open curved portions attached to hinged members

• US Classifications

  • 016 - Miscellaneous hardware
  • 220 - Receptacles