1520429

Information

• Patent Grant
• 1520429

• References
• Source

• Patent Number

  1,520,429

• Date Filed

  Not available

• Date Issued

  Tuesday, December 23, 1924
  100 years ago

• CPC

  • G01C9/12 - by using a single pendulum
  • Y10S116/24 - with suction cups

• US Classifications

  • 033 - Geometrical instruments
  • 116 - Signals and indicators