3593912

Information

• Patent Grant
• 3593912

• References
• Source

• Patent Number

  3,593,912

• Date Filed

  Not available

• Date Issued

  Tuesday, July 20, 1971
  53 years ago

• CPC

  • B65D27/32 - Opening devices incorporated during envelope manufacture
  • B65D27/04 - with apertures or windows for viewing contents
  • Y10S229/925 - Finger opening

• US Classifications

  • 229 - Envelopes, wrappers, and paperboard boxes