3920173

Information

• Patent Grant
• 3920173

• References
• Source

• Patent Number

  3,920,173

• Date Filed

  Not available

• Date Issued

  Tuesday, November 18, 1975
  49 years ago

• CPC

  • B21D5/10 - for making tubes
  • B21C37/16 - Making tubes with varying diameter in longitudinal direction
  • Y10S29/041 - Taper tube making
  • Y10T29/5185 - Tube making

• US Classifications

  • 228 - Metal fusion bonding
  • 029 - Metal working
  • 072 - Metal deforming