2843757

Information

• Patent Grant
• 2843757

• References
• Source

• Patent Number

  2,843,757

• Date Filed

  Not available

• Date Issued

  Tuesday, July 15, 1958
  67 years ago

• CPC

  • H04N1/407 - Control or modification of tonal gradation or of extreme levels
  • G01J1/44 - Electric circuits
  • G05B11/017 - using photo-electric means

• US Classifications

  • 250 - Radiant energy