3764223

Information

• Patent Grant
• 3764223

• References
• Source

• Patent Number

  3,764,223

• Date Filed

  Not available

• Date Issued

  Tuesday, October 9, 1973
  51 years ago

• CPC

  • G01V3/102 - by measuring amplitude
  • E01C23/0953 - by thermal effect
  • E01C23/14 - for heating or drying foundation, paving, or materials thereon
  • E02D29/14 - Covers for manholes or the like Frames for covers

• US Classifications

  • 404 - Road structure, process, or apparatus
  • 324 - Electricity: measuring and testing