3818327

Information

• Patent Grant
• 3818327

• References
• Source

• Patent Number

  3,818,327

• Date Filed

  Not available

• Date Issued

  Tuesday, June 18, 1974
  50 years ago

• CPC

  • G01B13/06 - for measuring thickness
  • G01B2210/42 - with one or more detectors on a single side of the object to be measured and with a backing surface of support or reference on the other side
  • G01B2210/62 - Support for workpiece air film or bearing with positive or negative pressure

• US Classifications

  • 324 - Electricity: measuring and testing
  • 033 - Geometrical instruments
  • 269 - Work holders