Unpacking patent barrels

2. The lacing is used to prevent the explosion-proof barrel from being lost. There is no anti-theft effect without lacing, so lacing is not a necessary technical feature, but a dispensable one;

There is something wrong with this statement of Nanjing Company; Since it is written into the exclusive right, it is part of the scope of protection; It doesn't mean that what he said is not a necessary technical feature, so it is not protected.

Beijing company's lace-free and non-infringement