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| Patents for David H. Mason | |||||
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| Picture | Number | Date | Patentee | Title | |
| 3,526X | May 17, 1822 | D.H. Mason | Making metallic plates for engraving and printing | ||
| 4,322X | Jan. 26, 1826 | D.H. Mason | Ornamenting tools and stamps for bookbinders | ||
 | 5,736X | Dec. 02, 1829 | D.H. Mason, M.W. Baldwin | Press, called Bramah's hydrostatic press | |
| 7,110X | Jun. 07, 1832 | D.H. Mason | Figure lathe to prevent counterfeiting | ||