3921251

Information

• Patent Grant
• 3921251

• References
• Source

• Patent Number

  3,921,251

• Date Filed

  Not available

• Date Issued

  Tuesday, November 25, 1975
  49 years ago

• CPC

  • E05D15/463 - specially adapted for overhead wings
  • E05D13/1215 - specially adapted for overhead wings
  • E05Y2900/106 - for garages
  • Y10T16/5386 - having force adjustment
  • Y10T16/53885 - to counterbalance weight of hinged member [e.g., horizontal closure biased to open position]

• US Classifications

  • 016 - Miscellaneous hardware
  • 049 - Movable or removable closures