Names have little to do with defense.
As for the technical features (or advantages) mentioned in the name, such as ① a thermos cup, ② a portable cup, ③ a cup, ④ a cup, it doesn't matter what the name is, sometimes it is requested by the applicant, and advertising is better. Well, I'll know what to do as soon as I take out the certificate, which is reflected in the name of the patent.
Or the patent agent did it himself. For example, I divide a patent into several patents to avoid confusion when submitting it. For example: ① A compact worm gear reducer ② A high-speed self-cooling reducer ③ A symmetrical axis reducer ④ A reducer with high assembly accuracy can reduce the trouble for patent agents. After all, there are many patents with the same name. What should I do if there is an error in the specification or claim or the appended drawings of the specification when submitting?