3840197

Information

• Patent Grant
• 3840197

• References
• Source

• Patent Number

  3,840,197

• Date Filed

  Not available

• Date Issued

  Tuesday, October 8, 1974
  50 years ago

• CPC

  • B21C47/323 - Slits or pinces on the cylindrical wall of a reel or bobbin, adapted to grip the end of the material being wound
  • B21C47/30 - expansible or contractible

• US Classifications

  • 242 - Winding, tensioning, or guiding