Look carefully, the right granted to the patentee is "no unit or individual may implement it without the permission of the patentee", and the patent right is an exclusive right, not an enforcement right. In other words, after the patent certificate is taken down, the patentee can prohibit others from implementing it, but can he implement it himself? Hehe, not necessarily. But why is this? Please allow me to sell it first and tell a story about a chair.
Before the Three Kingdoms, there was no such thing as a chair. Everyone is sitting on the floor, probably because not everyone feels comfortable cross-legged. Slowly, in the Jin, Southern and Northern Dynasties, there was a Hu bed, which was very similar in shape to the present Mazar, and the legs on both sides could be folded together, making it very convenient to carry and store. It was not until the Tang Dynasty that chairs with backrests appeared.
Ah, I put the wrong photo.
If the inventor A, who makes the Hu bed, finds a reliable agent, the agent will certainly seek a broader protection scope for the inventor A when he sees such a brand-new product. Claim 1 may be written like this.
A few years later, because people became more and more lazy, another inventor B made a chair with a backrest. He is also very aware of patent protection and has found an agent to apply for a patent. Claim 1 is written like this.
Now that the background introduction is over, let's look at inventors A and B. Inventor a's patent is prior.