1972578

Information

• Patent Grant
• 1972578

• References
• Source

• Patent Number

  1,972,578

• Date Filed

  Not available

• Date Issued

  Tuesday, September 4, 1934
  90 years ago

• CPC

  • H04R21/028 - with a fluid as resistance material
  • G01L1/20 - by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids by making use of electro-kinetic cells
  • Y10T82/2585 - Tool rest

• US Classifications

  • 338 - Electrical resistors
  • 073 - Measuring and testing
  • 082 - Turning
  • 340 - Communications: electrical