2. The unit patent must be agreed with the unit in advance. Generally, you will be paid by the unit, and the patent belongs to the unit.
Finding a job and owning a patent are two different things. Let's just say that you know something about the concept of patent. If the unit you are applying for does not have such demand, the benefits are not great.
I have about 20 international patents, and I can only say that I have learned a lot from them, but I still don't think it has much direct impact on my work.
Don't treat patents as weapons, just as one of the job skills. :-)