1936498

Information

• Patent Grant
• 1936498

• References
• Source

• Patent Number

  1,936,498

• Date Filed

  Not available

• Date Issued

  Tuesday, November 21, 1933
  91 years ago

• CPC

  • B23B51/108 - having a centering twist drill
  • B23B51/0063 - Centerdrills
  • B23P15/32 - twist-drills

• US Classifications

  • 076 - Metal tools and implements, making
  • 219 - Electric heating