Can the basic salary of patent engineers be discussed during the interview?

Of course.

The basic salary of this industry is very low, and the main income depends on your agency fee. You have to find out the percentage of commission. In terms of workload, the number of patent agents can reach about 20 per month, but this does not mean that each friend will have that many. If there weren't so many people looking for your agent, you wouldn't have so many patents to deal with.

In addition, I feel that this company has a low commission. Generally, 20 patents are represented every month, and the income should be above 6000.