Syringe-implantable identification transponder

A transponder for syringe implantation into a host animal, consisting essentially of:

• coil means;
• integrated circuit means for storing an identification code and outputting the same upon reception of an interrogation signal by said coil means, and for generating a transmission frequency by dividing the frequency of the interrogation signal;
• carrier means for maintaining said coil and said integrated circuit means in specified physical relationship to one another;
• conductor means connecting said integrated circuit means and said coil;
• and
• encapsulation means for encapsulating said coil means integrated circuit means, carrier means, and conductor means in sealed relation as a unit and employing a material having characteristics equivalent to glass for preventing leakage of internal fluids of said host animal into said unit for a period of time in excess of several months.

A transponder adapted to be syringe-implanted in a host animal, for responding to an interrogation signal over a monitoring period extending over a plurality of months after such syringe implantation, comprising:

• a coil for radio frequency coupling to an interrogator, for receiving an interrogation signal, and for transmitting a radio frequency identification signal;
• an integrated circuit for detecting an interrogation signal transmitted by said interrogator and received by said coil, for storing an identification code, for generating an identification signal transmission frequency by integer division of the interrogation signal, and for transmitting an identification signal substantially instantaneously upon detection of the interrogation signal, whereby said transmission of the identification signal is accomplished without storage of energy received from said interrogator;
• and
• means encapsulating said coil and said integrated circuit as a sealed container formed of a material having characteristics equivalent to glass for preventing leakage thereinto of internal fluids in said host animal for the duration of said monitoring period.

A syringe implantable transponder for use in an identification system for monitoring a host such as an animal, fish or the like during a monitoring period extending over a plurality of months, said system comprising at least one interrogator adapted to emit an interrogation signal, said transponder comprising:

• a coil adapted to receive said interrogation signal and to transmit an identification signal;
• an integrated circuit chip connected to said coil,
• said chip comprising memory means for storing an identification code, and transmitter means responsive to said interrogation signal for transmitting said identification signal corresponding to said stored identification code;
• support means formed integrally with an elongated coil former means about which said coil is wound, said support means including means for physically maintaining said integrated circuit chip in specified physical relationship to said coil in an assembly configured for accommodating passage thereof through the interior of a syringe needle;
• and
• encapsulation means formed of a material which is transparent to radiation at the frequencies of said interrogation and identification signals and which has characteristics equivalent to glass, for sealing said coil, said integrated circuit chip and said support means therewithin to form a unit dimensioned for injection implantation by a syringe said encapsulating means being constructed of materials impervious to the internal fluids of said host for at least said monitoring period.

A transponder for implantation by injection from a syringe barrel into a host such as an animal, fish or the like, for responding to an external interrogation signal throughout a monitoring period extending over at least a plurality of months after implantation comprising:

• (a) a coil for receiving an interrogation signal and for transmitting an identification signal;
• (b) integrated circuit means connected to said coil for
• (i) detecting said interrogation signal;
• (ii) storing an identification code corresponding to said identification signal;
• (iii) generating said identification signal responsive to said identification code;
• and
• (iv) transmitting said identification signal;
• and
• (c) means for maintaining said coil and said integrated circuit means as a unit in predetermined relationship to one another with the external dimensions of said unit allowing passage of said unit through the syringe barrel, wherein said integrated circuit means for generating said identification signal comprises means for dividing said interrogation signal by an integer number, said maintaining means including means employing a material having characteristics equivalent to glass for sealingly enclosing said unit from infiltration by internal fluids of said host for the length of said monitoring period after implantation in said host.

A transponder for implantation by injection from the barrel of a syringe into a physiological host such as an animal fish or the like, for responding to an external interrogation signal throughout a monitoring period extending over a plurality of months comprising:

• coil means;
• integrated circuit means for storing an identification code and outputting the same upon reception of an interrogation signal by said coil means, and for generating a transmission frequency by dividing the frequency of the interrogation signal;
• carrier means for maintaining said coil and said integrated circuit in specified physical relationship to one another;
• conductor means connecting said integrated circuit and said coil;
• and
• encapsulation means of a material having characteristics equivalent to glass for encapsulating said coil means, integrated circuit means, carrier means, and conductor means into a unit having external dimensions for allowing passage of said unit through the syringe barrel with said unit sealed against migration thereinto of the internal fluids of said host throughout said monitoring period after implantation in said host.