2307912

Information

• Patent Grant
• 2307912

• References
• Source

• Patent Number

  2,307,912

• Date Filed

  Not available

• Date Issued

  Tuesday, January 12, 1943
  82 years ago

• CPC

  • G01D15/32 - for circular charts

• US Classifications

  • 346 - Recorders
  • 116 - Signals and indicators