3573843

Information

• Patent Grant
• 3573843

• References
• Source

• Patent Number

  3,573,843

• Date Filed

  Not available

• Date Issued

  Tuesday, April 6, 1971
  53 years ago

• CPC

  • G07C1/08 - wherein the time is indicated by marking an element
  • G01D9/285 - producing additional marks (
  • G01G9/005 - using radiations
  • G01N23/16 - the material being a moving sheet or a sheet or tube examined by a scanning probe
  • G01R17/00 - Measuring arrangements involving comparison with a reference value

• US Classifications

  • 346 - Recorders