2077390

Information

• Patent Grant
• 2077390

• References
• Source

• Patent Number

  2,077,390

• Date Filed

  Not available

• Date Issued

  Tuesday, April 20, 1937
  87 years ago

• CPC

  • G01V7/00 - Measuring gravitational fields or waves Gravimetric prospecting or detecting
  • G04D7/1207 - only for measuring

• US Classifications

  • 073 - Measuring and testing
  • 324 - Electricity: measuring and testing
  • 346 - Recorders
  • 968 - Horology