Bambu Lab was founded in 2020. Prusa, Creality and a whole bunch of other companies have been “violating” these patents long before Bambu even existed. Either this gets thrown out of court, or Stratasys will be able to sue quite literally every 3D printer manufacturer that exists for compensation.
What type of a spool holder you have in the dryer? It might be a good idea to get some bearings in there to help the spool spin as freely as possible.