3869904

Information

• Patent Grant
• 3869904

• References
• Source

• Patent Number

  3,869,904

• Date Filed

  Not available

• Date Issued

  Tuesday, March 11, 1975
  49 years ago

• CPC

  • H01J31/49 - Pick-up adapted for an input of electromagnetic radiation other than visible light and having an electric output
  • A61B8/00 - Diagnosis using ultrasonic, sonic or infrasonic waves
  • G01H9/002 - 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
  • Y10S359/901 - Acoustic holography

• US Classifications

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