1900978

Information

• Patent Grant
• 1900978

• References
• Source

• Patent Number

  1,900,978

• Date Filed

  Not available

• Date Issued

  Tuesday, March 14, 1933
  91 years ago

• CPC

  • B28B21/72 - Producing multilayer tubes

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 138 - Pipes and tubular conduits