3453890

Information

• Patent Grant
• 3453890

• References
• Source

• Patent Number

  3,453,890

• Date Filed

  Not available

• Date Issued

  Tuesday, July 8, 1969
  55 years ago

• CPC

  • G01L21/04 - wherein the chamber is closed by liquid vacuum gauges of the McLeod type

• US Classifications

  • 073 - Measuring and testing