3780389

Information

• Patent Grant
• 3780389

• References
• Source

• Patent Number

  3,780,389

• Date Filed

  Not available

• Date Issued

  Tuesday, December 25, 1973
  51 years ago

• CPC

  • B23G9/005 - Working nuts
  • F16B25/0021 - the material being metal
  • F16B25/0084 - characterised by geometric details of the tip
  • F16B25/103 - by means of a drilling screw-point

• US Classifications

  • 470 - Threaded, headed fastener, or washer making: process and apparatus