1520567

Information

• Patent Grant
• 1520567

• References
• Source

• Patent Number

  1,520,567

• Date Filed

  Not available

• Date Issued

  Tuesday, December 23, 1924
  100 years ago

• CPC

  • F16B39/24 - by means of washers, spring washers, or resilient plates that lock against the object
  • Y10S411/933 - Key or pawl locked
  • Y10S411/961 - Pawl and ratchet

• US Classifications

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