3821975

Information

• Patent Grant
• 3821975

• References
• Source

• Patent Number

  3,821,975

• Date Filed

  Not available

• Date Issued

  Tuesday, July 2, 1974
  50 years ago

• CPC

  • B60B3/16 - by bolts or the like
  • B25B13/485 - for theft-proof screws, bolts or nuts
  • F16B23/0069 - with holes to be engaged with corresponding pins on the tool or protruding pins to be engaged with corresponding holes on the tool
  • Y10S411/919 - Screw having driving contacts
  • Y10T70/5854 - Bolt, nut, stud, stud-cap
  • Y10T70/5991 - Tire or rim only

• US Classifications

  • 081 - Tools
  • 070 - Locks
  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener