2257525

Information

• Patent Grant
• 2257525

• References
• Source

• Patent Number

  2,257,525

• Date Filed

  Not available

• Date Issued

  Tuesday, September 30, 1941
  83 years ago

• CPC

  • F16B15/0007 - with two nail points extending in opposite directions, in order to fix two workpieces together
  • E04F13/0826 - engaging side grooves running along the whole length of the covering elements

• US Classifications

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