1666739

Information

• Patent Grant
• 1666739

• References
• Source

• Patent Number

  1,666,739

• Date Filed

  Not available

• Date Issued

  Tuesday, April 17, 1928
  96 years ago

• CPC

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

• US Classifications

  • 073 - Measuring and testing