But the problem of agents is not exactly what you said, because it is certainly much more difficult for them to understand technology than for technicians to understand patent knowledge, let alone unusual inventions. Therefore, "taking money is not responsible" is inevitable, which is also natural. Who makes technicians prefer to chew on inventions rather than spend a little time learning patent knowledge? You must have met a novice who made a low-level mistake. It should be like this.
In addition, there is a mention of "presentation fee", which is not collected by the patent office, but by the agent. You always have to pay a little. Have you ever worked? Just don't kill too hard.
Supplement: Usually, technicians know the general patent knowledge enough to cope with the general application, but under special circumstances, if there are mistakes in the application process, such as fighting with big companies, such as the examiner quarreling with his wife and taking it out on you ..., then the amateur level is not enough. At this time, if there is a great agent, it may be a miracle. After all, everyone knows all kinds of bright and dark laws, which are comparable to those who are not so tempered in actual combat. However, you are right, responsibility is a big problem!