1428861

Information

• Patent Grant
• 1428861

• References
• Source

• Patent Number

  1,428,861

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1922
  101 years ago

• CPC

  • G01C3/20 - with adaptation to the measurement of the height of an object

• US Classifications

  • 033 - Geometrical instruments