3715557

Information

• Patent Grant
• 3715557

• References
• Source

• Patent Number

  3,715,557

• Date Filed

  Not available

• Date Issued

  Tuesday, February 6, 1973
  52 years ago

• CPC

  • B23K11/084 - of helicoïdal seams
  • B21C37/12 - Making tubes or metal hoses with helically arranged seams

• US Classifications

  • 219 - Electric heating