2144216

Information

• Patent Grant
• 2144216

• References
• Source

• Patent Number

  2,144,216

• Date Filed

  Not available

• Date Issued

  Tuesday, January 17, 1939
  86 years ago

• CPC

  • G09B23/187 - for measuring instruments

• US Classifications

  • 434 - Education and demonstration
  • 235 - Registers
  • 338 - Electrical resistors
  • 708 - Electrical computers: arithmetic processing and calculating