3729771

Information

• Patent Grant
• 3729771

• References
• Source

• Patent Number

  3,729,771

• Date Filed

  Not available

• Date Issued

  Tuesday, May 1, 1973
  51 years ago

• CPC

  • E05F3/222 - electrically operated
  • E05F2003/228 - Arrangements where the end of the closer arm is sliding in a track
  • E05Y2201/462 - Electromagnets
  • E05Y2201/474 - Compression springs
  • E05Y2900/132 - Doors
  • Y10T16/22 - Thermally released check or closer
  • Y10T16/2799 - Spring and flexible link
  • Y10T292/1082 - Motor

• US Classifications

  • 016 - Miscellaneous hardware
  • 049 - Movable or removable closures
  • 292 - Closure fasteners