3819778

Information

• Patent Grant
• 3819778

• References
• Source

• Patent Number

  3,819,778

• Date Filed

  Not available

• Date Issued

  Tuesday, June 25, 1974
  50 years ago

• CPC

  • E02B11/005 - Drainage conduits
  • B26D3/16 - Cutting rods or tubes transversely
  • B26F1/003 - of the drill type
  • Y10S264/52 - Processes of making corrugated tubes for gas mask

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 425 - Plastic article or earthenware shaping or treating: apparatus