1805195

Information

• Patent Grant
• 1805195

• References
• Source

• Patent Number

  1,805,195

• Date Filed

  Not available

• Date Issued

  Tuesday, May 12, 1931
  93 years ago

• CPC

  • G01R13/12 - Chemical recording

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 252 - Compositions
  • 346 - Recorders
  • 361 - Electricity: electrical systems and devices