Nobody knows because the people claiming that patents are slowing down innovation never seem to actually work in that specific industry or have actual detailed knowledge. Almost makes one think they don't actually have real information and are just casuals.
People who work in the industry never talk about specific patents because patents are very vague and if you admit to being aware of something that potentially overlaps your work you're painting a target on your back. If you lose a lawsuit after that admission you're subject to 3x damages, not 1x https://en.wikipedia.org/wiki/Treble_damages