After the patent rights are changed, who should the service inventor ask for remuneration?

You can ask for it from the original unit, because the original unit should be remunerated when it is handed over to its subordinate company, and there should be rewards for you in the remuneration. Even if the original unit is transferred for free, you will still be paid the reward based on the market price.

Inventors or designers of service invention patent rights must not only be rewarded, but also remunerated commensurate with their contributions. Usually called “one reward, two rewards”, Zhuozhihui has corresponding policy interpretation.