1691135

Information

• Patent Grant
• 1691135

• References
• Source

• Patent Number

  1,691,135

• Date Filed

  Not available

• Date Issued

  Tuesday, November 13, 1928
  95 years ago

• CPC

  • G01K5/40 - of helical formation

• US Classifications

  • 073 - Measuring and testing
  • 374 - Thermal measuring and testing