2221443

Information

• Patent Grant
• 2221443

• References
• Source

• Patent Number

  2,221,443

• Date Filed

  Not available

• Date Issued

  Tuesday, November 12, 1940
  85 years ago

• CPC

  • A24D3/0245 - by winding

• US Classifications

  • 493 - Manufacturing container or tube from paper
  • 131 - Tobacco