Hope WW paid for the license as other manufacturers have.
Straight from the
www.inflatablekite.com website
Manufacturers who respect the rights of Industrial Property and the work of inventors begin by acquiring a license. But there are always (and in all domains) those that try to take advantage of the ingenuity of others, shamelessly copying licensed products, and justifying itself by the modification of some details here and there to confuse the issue.
Naturally, this situation is not healthy, either for the holder of the patents who incurred the costs of Industrial Protection, nor to the legitimate licensees who pay him royalties according to the legislation.