1 Subjects: “...unmanned aerial vehicles...”

2 Subjects: “...unmanned aerial vehicle...”

3 Subjects: “...unmanned aerial vehicles (UAVs)...”

4 Subjects: “...Unmanned Aerial Vehicles (UAV)...”

5 Subjects: “...unmanned aerial vehicle...”

6 Subjects: “...unmanned aerial vehicle (UAV)...”

7 Subjects: “...unmanned aerial vehicle (UAV)...”

8 Subjects: “...unmanned aerial vehicle (UAV)...”

9 Subjects: “...unmanned aerial vehicle...”

10 Subjects: “...unmanned aerial vehicle...”