3838820

Information

• Patent Grant
• 3838820

• References
• Source

• Patent Number

  3,838,820

• Date Filed

  Not available

• Date Issued

  Tuesday, October 1, 1974
  51 years ago

• CPC

  • B21C37/154 - Making multi-wall tubes
  • B21C3/04 - with non-adjustable section
  • B21C37/16 - Making tubes with varying diameter in longitudinal direction
  • F23D14/54 - for cutting or welding metal
  • Y10S266/904 - Blowpipe cutting heads

• US Classifications

  • 239 - Fluid sprinkling, spraying, and diffusing
  • 266 - Metallurgical apparatus