except for the above situations, you can come by yourself. This refers to self-submission. As for whether to prepare your own documents, people have different opinions, and the law does not require it.
It is recommended that professional people prepare the application documents. Besides technical attributes, patents also have legal attributes. The writing of application documents needs to be familiar with the patent law to a certain extent, otherwise it will be difficult to authorize, and it will be difficult to use it to protect rights.
add a point: although inventors/R&D personnel can also learn to write patents, for one thing, R&D work lies in R&D, so it's a bit awkward to spend a lot of time learning to write patents; Secondly, learning needs systematic training, and it is very likely that you think you have learned it, but there are misunderstandings in your understanding.
Of course, a little knowledge of patent law is helpful for R&D personnel to cooperate with agents and express their R&D contents. However, professional people should do professional things.
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