3558861

Information

• Patent Grant
• 3558861

• References
• Source

• Patent Number

  3,558,861

• Date Filed

  Not available

• Date Issued

  Tuesday, January 26, 1971
  54 years ago

• CPC

  • G01F23/446 - using opto-electrically actuated indicating means
  • G01C13/004 - vertical movement
  • G01D5/252 - a combination of conductors or channels
  • G06K7/10 - by electromagnetic radiation

• US Classifications

  • 073 - Measuring and testing
  • 250 - Radiant energy
  • 341 - Coded data generation or conversion