2172272

Information

• Patent Grant
• 2172272

• References
• Source

• Patent Number

  2,172,272

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1939
  85 years ago

• CPC

  • B21D28/34 - Perforating tools Die holders
  • B21D28/346 - length adjustable perforating tools
  • Y10S411/946 - Spring-seated
  • Y10T29/53687 - by rotation of work part
  • Y10T83/943 - Multiple punchings
  • Y10T279/17931 - Screw threaded
  • Y10T279/17941 - Nut lock

• US Classifications

  • 083 - Cutting
  • 029 - Metal working
  • 279 - Chucks or sockets
  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener