643931

Information

• Patent Grant
• 643931

• References
• Source

• Patent Number

  643,931

• Date Filed

  Not available

• Date Issued

  Tuesday, February 20, 1900
  125 years ago

• CPC

  • B68G7/05 - Covering or enveloping cores of pads
  • Y10T29/484 - with means to insert guide pin or fastener
  • Y10T29/486 - Cover stretching

• US Classifications

  • 029 - Metal working
  • 112 - Sewing