3138137

Information

• Patent Grant
• 3138137

• References
• Source

• Patent Number

  3,138,137

• Date Filed

  Not available

• Date Issued

  Tuesday, June 23, 1964
  60 years ago

• CPC

  • G01D13/04 - Construction
  • Y10S116/23 - Movable index

• US Classifications

  • 116 - Signals and indicators
  • 324 - Electricity: measuring and testing