1970538

Information

• Patent Grant
• 1970538

• References
• Source

• Patent Number

  1,970,538

• Date Filed

  Not available

• Date Issued

  Tuesday, August 21, 1934
  90 years ago

• CPC

  • G01F3/14 - comprising reciprocating pistons

• US Classifications

  • 073 - Measuring and testing
  • 091 - Motors: expansible chamber type