1443052

Information

• Patent Grant
• 1443052

• References
• Source

• Patent Number

  1,443,052

• Date Filed

  Not available

• Date Issued

  Tuesday, January 23, 1923
  102 years ago

• CPC

  • B25B27/023 - using screws
  • B25B27/04 - inserting or withdrawing keys
  • Y10T29/53822 - Machine key and another member
  • Y10T29/53857 - Central screw, work-engagers around screw

• US Classifications

  • 029 - Metal working