Patent documents can be very useful, particularly in areas where the patent is unenforceable. My team found the what3words patent very useful in reverse engine

Patent documents can be very useful, particularly in areas where the patent is unenforceable. My team found the what3words patent very useful in reverse engineering the what3words geocoding system, and have open-sourced our results: https://whatfreewords.org/ https://whatfreewords.org/