3638936

Information

• Patent Grant
• 3638936

• References
• Source

• Patent Number

  3,638,936

• Date Filed

  Not available

• Date Issued

  Tuesday, February 1, 1972
  53 years ago

• CPC

  • B41F13/68 - Adding inserts
  • B65H5/301 - comprising blade-like means inserted between the parts to be opened

• US Classifications

  • 270 - Sheet-material associating