2282924

Information

• Patent Grant
• 2282924

• References
• Source

• Patent Number

  2,282,924

• Date Filed

  Not available

• Date Issued

  Tuesday, May 12, 1942
  83 years ago

• CPC

  • G04D7/1221 - with recording

• US Classifications

  • 346 - Recorders
  • 073 - Measuring and testing