George Brayton, of Boston, Massachusetts patented an improved gas engine in 1872, US Patent #125166.<ref> https://www.google.com/patents/US125166?dq=george+brayton+1872</ref> This engine ran on gas but, in 1874, Brayton patented another engine which was capable of running on naphtha, a liquid fuel, US Patent #151468 A.<ref> https://www.google.com/patents/US151468?dq=george%2Bbrayton%2B1872&hl=en&sa=X&ved=0ahUKEwij3puXxbDSAhVEbRQKHTKoAEoQ6AEIIzAB</ref> A further patent was obtained in 1890.<ref> https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&NR=432114A&KC=A&FT=D&ND=3&date=18900715&DB=&locale=en_EP#</ref> | George Brayton, of Boston, Massachusetts patented an improved gas engine in 1872, US Patent #125166.<ref> https://www.google.com/patents/US125166?dq=george+brayton+1872</ref> This engine ran on gas but, in 1874, Brayton patented another engine which was capable of running on naphtha, a liquid fuel, US Patent #151468 A.<ref> https://www.google.com/patents/US151468?dq=george%2Bbrayton%2B1872&hl=en&sa=X&ved=0ahUKEwij3puXxbDSAhVEbRQKHTKoAEoQ6AEIIzAB</ref> A further patent was obtained in 1890.<ref> https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&NR=432114A&KC=A&FT=D&ND=3&date=18900715&DB=&locale=en_EP#</ref> |