3818426

Information

• Patent Grant
• 3818426

• References
• Source

• Patent Number

  3,818,426

• Date Filed

  Not available

• Date Issued

  Tuesday, June 18, 1974
  50 years ago

• CPC

  • G01N29/2437 - Piezoelectric probes
  • A61B8/4281 - characterised by sound-transmitting media or devices for coupling the transducer to the tissue
  • 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

  • 367 - Communications, electrical: acoustic wave systems and devices
  • 257 - Active solid-state devices
  • 310 - Electrical generator or motor structure