3439321

Information

• Patent Grant
• 3439321

• References
• Source

• Patent Number

  3,439,321

• Date Filed

  Not available

• Date Issued

  Tuesday, April 15, 1969
  55 years ago

• CPC

  • G01D7/00 - Indicating measured values
  • B64D2700/62219 - Electric safety devices

• US Classifications

  • 340 - Communications: electrical