3213675

Information

• Patent Grant
• 3213675

• References
• Source

• Patent Number

  3,213,675

• Date Filed

  Not available

• Date Issued

  Tuesday, October 26, 1965
  59 years ago

• CPC

  • G01H3/125 - for representing acoustic field distribution
  • H01J31/495 - Pick-up tubes adapted for an input of sonic, ultrasonic, or mechanical vibrations and having an electric output

• US Classifications

  • 073 - Measuring and testing
  • 313 - Electric lamp and discharge devices
  • 315 - Electric lamp and discharge devices: systems
  • 348 - Television
  • 367 - Communications, electrical: acoustic wave systems and devices