1538771

Information

• Patent Grant
• 1538771

• References
• Source

• Patent Number

  1,538,771

• Date Filed

  Not available

• Date Issued

  Tuesday, May 19, 1925
  99 years ago

• CPC

  • B23F21/18 - Taper hobs
  • B23F21/16 - Hobs
  • Y10T407/1715 - Hob

• US Classifications

  • 407 - Cutters, for shaping
  • 076 - Metal tools and implements, making