Silveira F da, Machado FM, Romano LN, Amaral FG, Ruppenthal JE. Strategy for the development of agricultural machinery: importance of patent analysis. BJO&PM [Internet]. 2018 Sep. 12 [cited 2024 Nov. 21];15(4):535-44. Available from: https://bjopm.org.br/bjopm/article/view/513