1893337

Information

• Patent Grant
• 1893337

• References
• Source

• Patent Number

  1,893,337

• Date Filed

  Not available

• Date Issued

  Tuesday, January 3, 1933
  93 years ago

• CPC

  • G01R13/12 - Chemical recording

• US Classifications

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