1631489

Information

• Patent Grant
• 1631489

• References
• Source

• Patent Number

  1,631,489

• Date Filed

  Not available

• Date Issued

  Tuesday, June 7, 1927
  97 years ago

• CPC

  • B25B13/485 - for theft-proof screws, bolts or nuts
  • B25B13/486 - using a threaded connection between screw and tool
  • Y10S411/91 - Antitamper means

• US Classifications

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