3620441

Information

• Patent Grant
• 3620441

• References
• Source

• Patent Number

  3,620,441

• Date Filed

  Not available

• Date Issued

  Tuesday, November 16, 1971
  53 years ago

• CPC

  • B65D27/34 - Lines of weakness
  • B65D27/36 - Finger openings, slots, or gripping tabs

• US Classifications

  • 229 - Envelopes, wrappers, and paperboard boxes