1947816

Information

• Patent Grant
• 1947816

• References
• Source

• Patent Number

  1,947,816

• Date Filed

  Not available

• Date Issued

  Tuesday, February 20, 1934
  91 years ago

• CPC

  • G01R1/40 - Modifications of instruments to indicate the maximum or the minimum value reached in a time interval

• US Classifications

  • 346 - Recorders
  • 084 - Music