2557219

Information

• Patent Grant
• 2557219

• References
• Source

• Patent Number

  2,557,219

• Date Filed

  Not available

• Date Issued

  Tuesday, June 19, 1951
  75 years ago

• CPC

  • G05B11/017 - using photo-electric means

• US Classifications

  • 356 - Optics: measuring and testing
  • 033 - Geometrical instruments
  • 073 - Measuring and testing
  • 192 - Clutches and power-stop control
  • 250 - Radiant energy
  • 318 - Electricity: motive power systems
  • 359 - Optical: systems and elements