3377459

Information

• Patent Grant
• 3377459

• References
• Source

• Patent Number

  3,377,459

• Date Filed

  Not available

• Date Issued

  Tuesday, April 9, 1968
  56 years ago

• CPC

  • B23K11/084 - of helicoïdal seams
  • Y10T29/49382 - Helically finned

• US Classifications

  • 219 - Electric heating
  • 029 - Metal working