1978396

Information

• Patent Grant
• 1978396

• References
• Source

• Patent Number

  1,978,396

• Date Filed

  Not available

• Date Issued

  Tuesday, October 30, 1934
  90 years ago

• CPC

  • B65D5/4204 - Inspection openings or windows
  • B65D5/2028 - triangular
  • B65D5/2061 - of triangular shape

• US Classifications

  • 229 - Envelopes, wrappers, and paperboard boxes
  • 053 - Package making