1389172

Information

• Patent Grant
• 1389172

• References
• Source

• Patent Number

  1,389,172

• Date Filed

  Not available

• Date Issued

  Tuesday, August 30, 1921
  103 years ago

• CPC

  • F16B39/24 - by means of washers, spring washers, or resilient plates that lock against the object
  • Y10S411/981 - Coiled washer

• US Classifications

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