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

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

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

4 Subjects: “...unmanned aerial vehicle swarm...”

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

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

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

8 Subjects: “...Unmanned Aerial Vehicles...”

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