3622794

Information

• Patent Grant
• 3622794

• References
• Source

• Patent Number

  3,622,794

• Date Filed

  Not available

• Date Issued

  Tuesday, November 23, 1971
  53 years ago

• CPC

  • G03H1/0486 - Improving or monitoring the quality of the record
  • G03H2001/0489 - by using phase stabilized beam

• US Classifications

  • 250 - Radiant energy
  • 073 - Measuring and testing
  • 356 - Optics: measuring and testing
  • 359 - Optical: systems and elements