For aerospace it's more like asking if Google, Meta, and Apple are encumbered by patents, because they're all big players. The smaller players tend to do one hyper-specific thing for a big player.
Also for aerospace the patents are more legitimate. Software is encumbered by stupid patents <obvious idea> but on a computer! whereas aerospace patents are more legitimately about hardware that indeed took years and millions to develop and optimize.
For aerospace it's more like asking if Google, Meta, and Apple are encumbered by patents, because they're all big players. The smaller players tend to do one hyper-specific thing for a big player.
Also for aerospace the patents are more legitimate. Software is encumbered by stupid patents <obvious idea> but on a computer! whereas aerospace patents are more legitimately about hardware that indeed took years and millions to develop and optimize.