3603139

Information

• Patent Grant
• 3603139

• References
• Source

• Patent Number

  3,603,139

• Date Filed

  Not available

• Date Issued

  Tuesday, September 7, 1971
  53 years ago

• CPC

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

• US Classifications

  • 073 - Measuring and testing
  • 367 - Communications, electrical: acoustic wave systems and devices