1551648

Information

• Patent Grant
• 1551648

• References
• Source

• Patent Number

  1,551,648

• Date Filed

  Not available

• Date Issued

  Tuesday, September 1, 1925
  100 years ago

• CPC

  • B44B3/001 - by copying
  • B44B2700/021 - by copying
  • Y10T409/301568 - by use of pivotally supported tracer

• US Classifications

  • 409 - Gear cutting, milling, or planing
  • 033 - Geometrical instruments