Recall that Blue Origin patented landing rockets on sea platforms: https://www.geekwire.com/2015/jeff-bezos-blue-origin-dealt-setback-in-patent-dispute-with-spa

Recall that Blue Origin patented landing rockets on sea platforms: https://www.geekwire.com/2015/jeff-bezos-blue-origin-dealt-setback-in-patent-dispute-with-spacex-over-rocket-landings/ https://www.geekwire.com/2015/jeff-bezos-blue-origin-dealt-s... After various legal proceedings, that patent was invalidated.