3858438

Information

• Patent Grant
• 3858438

• References
• Source

• Patent Number

  3,858,438

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1975
  50 years ago

• CPC

  • G04F10/10 - by measuring electric or magnetic quantities changing in proportion to time
  • G01B17/02 - for measuring thickness
  • Y10S73/901 - Digital readout

• US Classifications

  • 073 - Measuring and testing
  • 968 - Horology