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Radio-physiological method and means

  • US 2,958,781 A
  • Filed: 03/18/1957
  • Issued: 11/01/1960
  • Est. Priority Date: 03/22/1956
  • Status: Expired due to Term
First Claim
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10. A RESPONDER UNIT IN THE FORM OF AN INTROMITTENT CAPSULE COMPRISING A SEALED CASING OF INSULATING MATERIAL, A PIEZO-ELECTRIC CRYSTAL MOUNTED IN SAID SEALED CASING, AND SIGNAL RECEIVING MEANS WITHIN SAID CASING CONNECTED WITH SAID CRYSTAL AND FORMING A RESONATING CIRCUIT WITH SAID CRYSTAL.

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