Loughhead, Malcolm, "Braking apparatus," 23 Temmuz 2020 tarihinde Wayback Machine sitesinde arşivlendi. U.S. Patent no. 1,249,143 (filed: 1917 January 22 ; issued: 1917 December 4).
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Loughhead, Malcolm, "Braking apparatus," 23 Temmuz 2020 tarihinde Wayback Machine sitesinde arşivlendi. U.S. Patent no. 1,249,143 (filed: 1917 January 22 ; issued: 1917 December 4).