Patents Assigned to Alvin Krass
  • Psychological testing apparatus
    Patent number: 4022975
    Abstract: An apparatus is described which, in addition to testing each ear of a human subject separately for extent of hearing and frequency detection, also permits the delivery, preferably by electronic means for pre-set arrangement, of a series of intermittent long and short signals in different combinations, by means of which the subject can be tested for auditory memory and hearing side dominance.
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: May 10, 1977
    Assignee: Alvin Krass
    Inventor: Alvin Krass