3820481

Information

• Patent Grant
• 3820481

• References
• Source

• Patent Number

  3,820,481

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  50 years ago

• CPC

  • D05B37/02 - Slitting or grooving devices
  • D05B3/10 - for making piped openings
  • D05D2207/02 - Pneumatic or hydraulic devices

• US Classifications

  • 112 - Sewing