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INTELLIGENCE TESTING AND SIGNAL ANALYZING MEANS AND METHOD EMPLOYING ZERO CROSSING DETECTION
US 3,498,287 A
Filed
: 04/28/1966
Issued
: 03/03/1970
Est. Priority Date
: 04/28/1966
Status: Expired due to Term
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Current Assignee
John P. Ertl
Original Assignee
John P. Ertl
Inventors
Ertl, John P.
Application Number
US04/546,080
Time in Patent Office
1,405 Days
Field of Search
US Class Current
600/544
CPC Class Codes
A61B 5/377
using evoked responses
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