2131952

Information

• Patent Grant
• 2131952

• References
• Source

• Patent Number

  2,131,952

• Date Filed

  Not available

• Date Issued

  Tuesday, October 4, 1938
  86 years ago

• CPC

  • G01D7/10 - giving indication in co-ordinate form
  • F41G5/12 - acoustically influenced
  • G01S3/78 - using electromagnetic waves other than radio waves

• US Classifications

  • 033 - Geometrical instruments
  • 089 - Ordnance
  • 181 - Acoustics
  • 235 - Registers
  • 353 - Optics: image projectors