3458684

Information

• Patent Grant
• 3458684

• References
• Source

• Patent Number

  3,458,684

• Date Filed

  Not available

• Date Issued

  Tuesday, July 29, 1969
  55 years ago

• CPC

  • B21D51/00 - Making hollow objects
  • B21C37/124 - the tubes having a special shape
  • B21D51/12 - objects with corrugated walls

• US Classifications

  • 219 - Electric heating
  • 228 - Metal fusion bonding