"Service inventions"---are inventions and creations completed by you using the material, money, and other resources of your unit, or by accepting and performing tasks of your unit.
You are only the inventor, and the patentee is the unit. The unit has the right to use and benefit from it, but you do not have these rights.
When you made this invention, your unit should have rewarded you related to the act of creating the invention. For example, bonuses, salary increases, free holidays, etc.
If you find a job in another unit, if that unit uses this patent, both you and that unit may be sued.
In court, if you can prove that the use of the patent has nothing to do with you, then you will not bear any responsibility.
The actual user will bear infringement liability and compensation liability.