3257885

Information

• Patent Grant
• 3257885

• References
• Source

• Patent Number

  3,257,885

• Date Filed

  Not available

• Date Issued

  Tuesday, June 28, 1966
  58 years ago

• CPC

  • B31B1/24 - Making window openings
  • B31B2201/908 - involving cutting window openings
  • Y10S83/911 - Envelope blank forming
  • Y10T83/4838 - With anvil backup
  • Y10T83/4844 - Resiliently urged cutter or anvil member
  • Y10T83/9387 - Punching tool

• US Classifications

  • 083 - Cutting