1384809

Information

• Patent Grant
• 1384809

• References
• Source

• Patent Number

  1,384,809

• Date Filed

  Not available

• Date Issued

  Tuesday, July 19, 1921
  103 years ago

• CPC

  • G01P3/34 - by using friction effects

• US Classifications

  • 073 - Measuring and testing
  • 116 - Signals and indicators