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| Patents for John Elgar | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,127X | Sep. 01, 1809 | J. Elgar, J. Elgar, Sr. | Nail Machine | nail making machines | |
| 6,124X | Oct. 01, 1830 | J. Elgar | Rail road cars | ||
| 7,524X | Apr. 12, 1833 | J. Elgar | Revolving platform for railroads (Turntable) | ||
| 7,801X | Nov. 19, 1833 | J. Elgar | Improvement in the wheels of rail road carriages | ||
| 9,225X | Nov. 07, 1835 | J. Elgar | Steam-boat for canals | ||
| 9,226X | Nov. 07, 1835 | J. Elgar | Transportation on canals and rail-roads | ||