bɪkˈʌz hiː dɪdnˌɑːt pˈæʔn̩t ðə plˈɑːɾɚ, mˈɛni ˈʌðɚ mˌænjuːfˈæktʃɚɹɚz ɹᵻlˈiːst ðɛɹ ˈoʊn vˈɜːʒənz, sˈʌtʃ ɐz ðə bɹˈɪɾɪʃ pˈoːɹtlənd kˈoːɹs plˈɑːɾɚ.
Because he did not patent the plotter, many other manufacturers released their own versions, such as the British Portland Course Plotter.