1938633

Information

• Patent Grant
• 1938633

• References
• Source

• Patent Number

  1,938,633

• Date Filed

  Not available

• Date Issued

  Tuesday, December 12, 1933
  91 years ago

• CPC

  • B21C37/14 - Making tubes from double flat material
  • Y10S29/038 - Spot welding with other step
  • Y10T29/49391 - Tube making or reforming

• US Classifications

  • 228 - Metal fusion bonding
  • 029 - Metal working
  • 138 - Pipes and tubular conduits