Edit: thank you! Original Source (per the HN Guidelines): https://carbuzz.com/bmw-roundel-logo-screw-patent/ https://carbuzz.com/bmw-roundel-logo-screw-patent

Edit: thank you! Original Source (per the HN Guidelines): https://carbuzz.com/bmw-roundel-logo-screw-patent/ https://carbuzz.com/bmw-roundel-logo-screw-patent/ (Also has the drawings of the screws from the patents.)