sentences:  Watson's introduction mentions that he had read Lanchester's work, stating that their findings are similar, but that he arrived at his theories independently.His next patent represented the body of his aeronautical work that he spent the rest of his life researching; his rocking wing concept of lateral control.Applied for on 1 January 1909, the complete specification is dated 23 July 1909 and was left with the Patent Office a day later and accepted on 16 December that year.