3454776

Information

• Patent Grant
• 3454776

• References
• Source

• Patent Number

  3,454,776

• Date Filed

  Not available

• Date Issued

  Tuesday, July 8, 1969
  55 years ago

• CPC

  • G01D18/00 - Testing or calibrating of apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
  • G01B11/00 - Measuring arrangements characterised by the use of optical means
  • G01C1/02 - Theodolites
  • G01C1/06 - Arrangements for reading scales
  • G01D5/26 - characterised by optical transfer means
  • G01D13/02 - Scales Dials
  • G01R25/00 - Arrangements for measuring phase angle between a voltage and a current, or between voltages or currents

• US Classifications

  • 250 - Radiant energy
  • 356 - Optics: measuring and testing