3828435

Information

• Patent Grant
• 3828435

• References
• Source

• Patent Number

  3,828,435

• Date Filed

  Not available

• Date Issued

  Tuesday, August 13, 1974
  50 years ago

• CPC

  • E21F17/185 - Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence
  • G01B7/16 - for measuring deformation in a solid
  • G01B2210/66 - Rock or ground anchors having deformation measuring means

• US Classifications

  • 033 - Geometrical instruments