3623241

Information

• Patent Grant
• 3623241

• References
• Source

• Patent Number

  3,623,241

• Date Filed

  Not available

• Date Issued

  Tuesday, November 30, 1971
  53 years ago

• CPC

  • A61B5/121 - evaluating hearing capacity
  • G09B23/187 - for measuring instruments
  • G09B23/28 - for medicine

• US Classifications

  • 434 - Education and demonstration