1457939

Information

• Patent Grant
• 1457939

• References
• Source

• Patent Number

  1,457,939

• Date Filed

  Not available

• Date Issued

  Tuesday, June 5, 1923
  101 years ago

• CPC

  • G01K3/12 - based upon expansion or contraction of materials

• US Classifications

  • 337 - Electricity: electrothermally or thermally actuated switches
  • 374 - Thermal measuring and testing