2183934

Information

• Patent Grant
• 2183934

• References
• Source

• Patent Number

  2,183,934

• Date Filed

  Not available

• Date Issued

  Tuesday, December 19, 1939
  86 years ago

• CPC

  • G01R13/04 - for producing permanent records
  • G01R13/14 - Recording on a light-sensitive material

• US Classifications

  • 324 - Electricity: measuring and testing