ˈælən wʌz ɐwˈɔːɹdᵻd ˈɔːlmoʊst θɹˈiːhˈʌndɹɪd pˈæʔn̩ts fɚɹə wˈaɪd ɹˈeɪndʒ ʌv fˈɑːɹmɪŋ məʃˈiːnɚɹi, ɪŋklˈuːdɪŋ ðə fˈɜːɾəlˌaɪzɚ dɹˈɪl, sˈiːd dɹˈɪl, pətˈeɪɾoʊ dˈɪɡɚ, kˈʌltᵻvˌeɪɾɚ, fˈɜːɹoʊɚ, pˈʌlvɚɹˌaɪzɚ, ɡɹˈæs ˈɛdʒɚ ænd nˈuːmɚɹəs ˈʌðɚ fˈɑːɹm ˈɪmplɪmənts.
Allen was awarded almost 300 patents for a wide range of farming machinery, including the fertilizer drill, seed drill, potato digger, cultivator, furrower, pulverizer, grass edger and numerous other farm implements.