3840743

Information

• Patent Grant
• 3840743

• References
• Source

• Patent Number

  3,840,743

• Date Filed

  Not available

• Date Issued

  Tuesday, October 8, 1974
  50 years ago

• CPC

  • H01J37/256 - using scanning beams
  • H01J49/286 - with energy analysis

• US Classifications

  • 850 - Scanning-probe techniques or apparatus
  • 250 - Radiant energy