A drone apparatus or arrangement is provided. The drone apparatus or arrangement includes a plurality of drone devices, each drone device including an unmanned vehicle configured to be controlled to hover in air at a desired height and move to a desired location, each drone device comprising a rechargeable battery connected to an exposed drone recharging surface, and a surface apparatus connected to the plurality of drone devices such that the plurality of drone devices are collectively controllable to repo
Source : Espacenet – Bibliographic data
