3520307

Information

• Patent Grant
• 3520307

• References
• Source

• Patent Number

  3,520,307

• Date Filed

  Not available

• Date Issued

  Tuesday, July 14, 1970
  54 years ago

• CPC

  • A24F1/16 - with zigzag or like passages for the smoke
  • A24F13/06 - with smoke filters
  • A24F2700/04 - Pipes filled with absorbant materials, pipes with devices filtering the smoke

• US Classifications

  • 131 - Tobacco