Patent ID: 8179247

Claim:
A RF system for preventing hunting accidents comprising: attached to a shooter an interrogator that comprises RF signal source arranged to radiate request signals, a RF detection system including a microprocessor, and an alert information system that is activated by received response signal, attached to a friendly target a transponder comprising RF detection system including a microprocessor, a RF signal source that is arranged to radiate said RF response signals, and an alert information system that is activated by said received request signal; wherein said interrogator is mounted on a firearm, which contains a transmitter equipped with a sharp-diagram RF Ka-band antenna that sends a RF request signal in area to which sightline of said firearm is directed, and a receiver equipped with a unidirectional antenna that receives a RF response signal emitted by said transponder, wherein said RF response signal has wavelength that is different from wavelength of said RF request signal, one or more said transponders attached to uniform of friendly target in any convenient place, which contains a receiver equipped with a unidirectional Ka-band antenna that receives said RF request signal emitted by said interrogator and a transmitter equipped with a unidirectional antenna that sends said RF response signal to said interrogator; wherein said RF response signal utilizes wavelength matched with operational wavelength of said receiver of said interrogator, and said RF request signal utilizes wavelength matched with operational wavelength of said receiver of said transponder, said microprocessor controlling said transmitter and receiver of said interrogator, which develops said request signals and processes an input RF response signal, said microprocessor controlling said transmitter and receiver of said transponder, which processes said input RF request signals and develops said response signal, an alert light mounted on sight of said firearm and activated by said microprocessor of said interrogator, an alert buzzer incorporated in said transponder that is activated by said microprocessor of said transponder.