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The duty of an intellectual property lawyer is to be responsible for infringement litigation and patent invalidation when there is infringement (patent infringement, trademark infringement, etc.). For example, if A wants to invalidate one of B's patents, he should seek a patent lawyer. Similarly, if a product of C is sued by A for infringement, it will also find a patent lawyer).
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IPO lawyers are responsible for financial, stock and other mergers and acquisitions, judging the legality of the other party's business activities, guiding the legality of merger and acquisition procedures, giving opinions, etc., and have little to do with intellectual property rights.
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It is unrealistic to transfer posts to each other in theory. After all, the fields involved are different, but the same thing is that they all have a lawyer's practice license, which is not absolute (how to say it, it is domestic, but it depends on whether the customer approves it)