3091991

Information

• Patent Grant
• 3091991

• References
• Source

• Patent Number

  3,091,991

• Date Filed

  Not available

• Date Issued

  Tuesday, June 4, 1963
  61 years ago

• CPC

  • E01B9/12 - Retaining or locking devices for spikes or screws
  • Y10S411/922 - Nail, spike or tack having locking device
  • Y10S411/923 - Nail, spike or tack having specific head structure

• US Classifications

  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener