pɚhˈæps ðə mˈoʊst vˈæljuːəbəl ʌv ðiːz wʌz hɪz pɹˈɑːsɛs fɔːɹ mˌænjuːfˈæktʃɚɹɪŋ fˈɛðɚ fˈænz, wˌɪtʃ ɡˈeɪv hˌɪm ɐ pɹˈæktɪkəl mənˈɑːpəli ɪnðə pɹədˈʌkʃən ʌv ˈɑːstɹɪtʃ fˈɛðɚ fˈænz.
Perhaps the most valuable of these was his process for manufacturing feather fans, which gave him a practical monopoly in the production of ostrich feather fans.