The Patent Act of 1790 required each patent “to bear teste by the President of the United States.” Congress expected Washington to sign every patent for it to become official. There were more than 150 patents granted throughout Washington's presidency.
| Number | Date | Patentee | Title | Type |
| 1X | Jul. 31, 1790 | S. Hopkins | Making Pot And Pearl Ashes | |
| 2X | Aug. 06, 1790 | J.S. Sampson | Manufacturing Candles | chandler |
| 3X | Dec. 18, 1790 | O. Evans | Manufacturing flour and meal | miller |
| 4X | Jan. 29, 1791 | F. Bailey | Punch for making printing type | printer |
| 5X | Jan. 29, 1791 | A. Putnam | Improvement in distilling | distilling apparatus |
| 6X | Mar. 10, 1791 | J. Stone | Driving piles for bridges, etc. | |
| 7X | Mar. 11, 1791 | S. Mullikin | Machine for thrashing grain and corn | miller |
| 8X | Mar. 11, 1791 | S. Mullikin | Breaking and Swingling of Hemp, etc. | spinner |
| 9X | Mar. 11, 1791 | S. Mullikin | Machine for cutting and polishing stone and marble | stone boring and drilling machines |
| 10X | Mar. 11, 1791 | S. Mulliken | Machine for raising a nap on cloths | |
| 11X | Mar. 17, 1791 | G. Parkinson | Machine for Spinning Hemp and Flax etc. | flax and hemp machines |
| 12X | Jul. 30, 1791 | J. Dickerson | Improvement in tide mills | |
| 13X | Aug. 02, 1791 | S. Briggs, Sr., S. Briggs, Jr. | Machine for making nails | nail making machines |
| 14X | Aug. 02, 1791 | W. Thomson | Machine for thrashing wheat, etc. | miller |
| 15X | Aug. 04, 1791 | R.R. Livingston | Diminishing friction of spindles | |
| 16X | Aug. 10, 1791 | J. Biddis, T. Beadwell | Making extract of bark | bark processing machines |
| 17X | Aug. 10, 1791 | L.C. Kuhn | Improved bedstead | beds and bedsteads |
| 18X | Aug. 10, 1791 | P. Gordon | Manufacturing Boots | cobbler |
| 19X | Aug. 10, 1791 | H. Voight | Propelling boats by cattle | nautical propulsion apparatus |
| 20X | Aug. 10, 1791 | H. Keyser | Powder Mill for Manufacturing Gun Powder | gunsmith |
| 21X | Aug. 26, 1791 | J. Macomb | Horizontal hollow water wheels for mills | water wheels |
| 22X | Aug. 26, 1791 | J. Rumsey | Improvement on Dr Barker's mill | miller |
| 23X | Aug. 26, 1791 | J. Rumsey | Conveying water to operate on mills | miller |
| 24X | Aug. 26, 1791 | J. Rumsay | Improvement on captain Savary's steam engine | steam engines |
| 25X | Aug. 26, 1791 | J. Rumsay | Bellows | blacksmith |
| 26X | Aug. 26, 1791 | J. Rumsay | Generation of steam | stationary boilers |
| 27X | Aug. 26, 1791 | J. Rumsay | Application of steam to propel boats or vessels | steamboats |
| 28X | Aug. 26, 1791 | J. Fitch | Steam engine applied to navigation | steam engines |
| 29X | Aug. 26, 1791 | N. Read | Improved boiler of the steam engine | stationary boilers |
| 30X | Aug. 26, 1791 | N. Read | Improvement in distilling | distilling apparatus |
| 31X | Aug. 26, 1791 | J. Stevens, Jr. | Boiler for generating steam | stationary boilers |
| 32X | Aug. 26, 1791 | J. Stevens, Jr. | Raising water by steam | steam pumps |
| 33X | Aug. 26, 1791 | J. Stevens, Jr. | Application of steam to work bellows | steam apparatus |
| 34X | Aug. 26, 1791 | E. Cruse | Improvement on Savary's steam engine for raising water | steam engines |
| 35X | Nov. 24, 1791 | P. Zacharie | Machine for cleaning or deepening docks or harbors | |
| 36X | Dec. 30, 1791 | W. Pollard | Machine for Spinning Cotton | spinner |
| 37X | Jan. 02, 1792 | B. Folger | Cleansing whale oil | |
| 38X | Jan. 28, 1792 | O. Herbert | Spinning and Twisting Thread | spinner |
| 39X | Feb. 23, 1792 | J. Bailey | Steam Jack | |
| 40X | Feb. 24, 1792 | D. Hartley | Hardening and Tempering Steel | blacksmith |
| 41X | Mar. 07, 1792 | D. Ridgeway | Making Bricks | brick maker |
| 42X | Mar. 28, 1792 | S. Green | Canvas conductor to be used when houses are on fire | |
| 43X | May 09, 1792 | R. Leslie, T. Kirk | Weaving of wire | weaver |
| 44X | May 09, 1792 | T. Farrington | Bark and wood sawing | bark processing machines |
| 45X | Jul. 10, 1792 | G. Morris | Preservation of plants from frost | |
| 46X | Oct. 20, 1792 | S.G. Dorr | Raising and shearing the nap of cloth by a wheel of knives | splitting and shearing machinery |
| 47X | Oct. 23, 1792 | S. Hodge, J. Dorr | Handmill for picking of mill stones | mill stone picks |
| 48X | Jan. 26, 1793 | C. Batterman, J. Caldwell | Tobacco Manufacturing Machine | tobacco machinery |
| 49X | Jan. 26, 1793 | J. Pope | Improvement in wind mills | wind power |
| 50X | Jan. 26, 1793 | C. Colles | Manufacturing bricks | brick maker |
| 51X | Jan. 29, 1793 | S. Morey | New method of turning a spit | roasting jacks |
| 52X | Jan. 30, 1793 | R. Leslie | Double Pendulum for Ships | clockmaker |
| 53X | Jan. 30, 1793 | R. Leslie | Clock Pendulum | clockmaker |
| 54X | Jan. 30, 1793 | R. Leslie | Double Pendulum | clockmaker |
| 55X | Feb. 01, 1793 | R. Hodgson | Manufacturing oiled silk and linen | |
| 56X | Feb. 01, 1793 | A. Kingsley | Manufacturing of bricks | brick maker |
| 57X | Feb. 02, 1793 | R. Leslie | Construction and tone of bells | |
| 58X | Feb. 28, 1793 | R.R. Saltonstall | Manufacturing rhus or sumach | |
| 59X | Mar. 13, 1793 | J. Williams, Jr. | Moulds for claying sugar | patternmaker |
| 60X | Apr. 11, 1793 | J. Carnes, Jr. | Improvement in paper moulds | patternmaker |
| 61X | Apr. 29, 1793 | E. Ryan | Furnace for pot and pearl ashes | industrial furnaces |
| 62X | May 01, 1793 | R.R. Saltonstall | Manufacturing rhus or sumach | |
| 63X | Jun. 11, 1793 | R. Heterick | Stove of cast iron | stoves |
| 64X | Jul. 05, 1793 | J.S. Sampson | Applying and regulating the sails of ships and boats | shipwright |
| 65X | Aug. 17, 1793 | S. Brower | Manufacture of bricks and pantiles | brick maker |
| 66X | Dec. 02, 1793 | A. Babcock | Machines for propelling boats, vessels and carriages | nautical propulsion apparatus |
| 67X | Dec. 31, 1793 | J. Clarke (Clark) | Machine to work in a current of water or other fluid | |
| 68X | Feb. 07, 1794 | T. Perkins | Manufacturing nails | nail making machines |
| 69X | Feb. 14, 1794 | J. Davenport | Weaving and beating duck sail | weaver |
| 70X | Mar. 04, 1794 | J. Simpson | Improvement in distilling spirituous liquors | distilling apparatus |
| 71X | Mar. 14, 1794 | Z. Cox | Round Saw | circular sawmills |
| 72X | Mar. 14, 1794 | E. Whitney | Ginning cotton | cotton gins |
| 73X | Mar. 23, 1794 | B. Taylor | Mode of preventing the progress of fire | |
| 74X | Mar. 23, 1794 | J.O. Peerson | Machine for Cutting Nails | nail making machines |
| 75X | Mar. 31, 1794 | J. Biddis | Improvement in manufacturing paper | |
| 76X | Apr. 12, 1794 | R. Robotham | Manufacturing of Mortar for Flooring Houses, etc. | stonemason |
| 77X | Apr. 25, 1794 | J.J. Staples, Jr. | Carriages to be Propelled by Mechanic Powers | carriage maker |
| 78X | Apr. 28, 1794 | W. Hodgson | Threshing Machine | miller |
| 79X | May 19, 1794 | J. Drake | Improvement in Bellows | blacksmith |
| 80X | Jun. 02, 1794 | R. Robotham | Manufacturing of Candles | chandler |
| 81X | Jun. 16, 1794 | G. Parkinson | Manufacturing cordage | |
| 82X | Jul. 19, 1794 | J. Markley | Grinding bark | bark processing machines |
| 83X | Jul. 29, 1794 | E. Rigg | Water working pumps | pumps |
| 84X | Sep. 02, 1794 | A. Anderson | Improvement in a steam still | steam stills |
| 85X | Sep. 13, 1794 | B. Wynkoop | New mode of propelling vessels | nautical propulsion apparatus |
| 86X | Sep. 24, 1794 | J. Fennel | Mode of making salt | salt making apparatus |
| 87X | Oct. 29, 1794 | J. Hatheway | Improvement in hydraulics | |
| 88X | Nov. 05, 1794 | J. Wardrop | Thrashing Machine | miller |
| 89X | Nov. 25, 1794 | J. Kincaid | Improvement in stills | steam stills |
| 90X | Dec. 20, 1794 | A. Kingsley | Brick Manufacturing | brick maker |
| 91X | Jan. 15, 1795 | S. Mullikin | Hemp and flax breaking | flax and hemp machines |
| 92X | Jan. 16, 1795 | J. Perkins | Machine for cutting nails | nail making machines |
| 93X | Jan. 31, 1795 | S. Kellogg | Improvement in shearing woolen and other cloths | splitting and shearing machinery |
| 94X | Mar. 25, 1795 | J. Ellicott | New mode of catching fish | |
| 95X | Mar. 25, 1795 | S. Morey | Improvement in Applying Steam | steam apparatus |
| 96X | May 25, 1795 | J. Youle | Construction of a caboose | |
| 97X | May 25, 1795 | J. Pittman | Manufacturing of cordage | rope maker |
| 98X | May 25, 1795 | D. Keller | Propelling boats | nautical propulsion apparatus |
| 99X | Jun. 19, 1795 | W.P. Sprague | Propelling boats and vessels with horses | nautical propulsion apparatus |
| 100X | Jun. 19, 1795 | B. Wynkoop | Nautical Ventilators | shipwright |
| 101X | Jun. 30, 1795 | J. Taylor | Worm still of Tinned Sheet Copper | steam stills |
| 102X | Jan. 09, 1796 | J. Dickerson | Sawing and Polishing of Stones | stonemason |
| 103X | Jan. 15, 1796 | J. Byington | Manufacturing Nails | nail making machines |
| 104X | Feb. 13, 1796 | J. Roberts, Jr. | Cleaning clover and other seed | miller |
| 105X | Feb. 16, 1796 | J. Eaton | Manufacturing of Seal Skins | leatherworker |
| 106X | Feb. 19, 1796 | E. Perkins | Removing pains by metallic points | |
| 107X | Apr. 11, 1796 | S. Morey | Raising Water by Wind | |
| 108X | Apr. 15, 1796 | J. Davis | Leather tanning | leatherworker |
| 109X | Apr. 15, 1796 | B. Tyler | Machine for Cleaning Wheat, etc. | miller |
| 110X | Apr. 20, 1796 | T. Bedwell | Improved mode of forming a yellow color | |
| 111X | Apr. 30, 1796 | S.L. Jr. | Composition of bilious pills | |
| 112X | May 04, 1796 | P. Zacharie | Machine for making nails and brads | nail making machines |
| 113X | May 12, 1796 | J. Hillard | Improvement in manufacturing sumach | |
| 114X | May 12, 1796 | R. Dawson | Improvement in bolting cloths | |
| 115X | May 12, 1796 | H. Hodgen | Cotton gin | cotton gins |
| 116X | May 27, 1796 | J.S. McLean | Improvement in piano fortes | music instrument maker |
| 117X | May 28, 1796 | O. Evans | Improvment in Burr Mill Stones | mill stones |
| 118X | May 31, 1796 | E. Backus | Steam engine and boiler | steam engines |
| 119X | Jul. 01, 1796 | L. McKechnie | Stays for removing distortions in the spine | |
| 120X | Jul. 02, 1796 | J.F. Mangin | Sawing and Polishing Marble and other Stones | stonemason |
| 121X | Oct. 17, 1796 | R. Grant | Machine for Scouring Rice and Other Grain | miller |
| 122X | Nov. 16, 1796 | G. James | Improvement in making salt | salt making apparatus |
| 123X | Nov. 16, 1796 | E. Ryan | Improvement in manufacturing pot ash | |
| 124X | Nov. 16, 1796 | J. Fowler | Improvement in concentrating the volatile parts of calcareous earth, stones, etc. | |
| 125X | Nov. 16, 1796 | P. Cliff | Manufacturing Cut Nails | nail making machines |
| 126X | Nov. 16, 1796 | I. Garretson | Machine for Heading and Cutting Nails | nail making machines |
| 127X | Nov. 16, 1796 | A. Kinsley | Printing Press | printing presses |
| 128X | Nov. 16, 1796 | J. Stansfield | Splitting Sheep Skins | splitting and shearing machinery |
| 129X | Nov. 16, 1796 | M.I. Brunel | Ruling Books and Paper | ruling machines |
| 130X | Nov. 16, 1796 | T. Bourke | Pumps | pumps |
| 131X | Nov. 17, 1796 | W. Frobisher | Manufacturing pot ash | |
| 132X | Nov. 17, 1796 | C. Rentgen | Forging Bolts and Round Iron | |
| 133X | Nov. 17, 1796 | A. Whitmore | Loom for Weaving Cloth | looms |
| 134X | Nov. 19, 1796 | A. Whitmore | Preambulator for Measuring a Ship's Way | shipwright |
| 135X | Nov. 19, 1796 | A. Whittemore | Machine for cutting nails | nail making machines |
| 136X | Nov. 19, 1796 | J. Bigelow | Manufacturing Nails | nail making machines |
| 137X | Dec. 12, 1796 | G. Chandler | Cutting and Heading Nails | nail making machines |
| 138X | Dec. 23, 1796 | T. Pasamore | Machine for cooking and boiling, called a conjurer | |
| 139X | Dec. 23, 1796 | D. French | Manufacturing Cut Nails | nail making machines |
| 140X | Dec. 23, 1796 | D. French | Manufacturing Wrought Nails | nail making machines |
| 141X | Dec. 23, 1796 | J. Byington | Heading Nails | nail making machines |
| 142X | Dec. 23, 1796 | J. Frost | Heading Nails | nail making machines |
| 143X | Dec. 23, 1796 | J. Deller | Separating Scoured Rice | miller |
| 144X | Dec. 23, 1796 | R. Watkins | Ginning Cotton | miller |
| 145X | Dec. 23, 1796 | J. Murray | Ginning Cotton | miller |
| 146X | Jan. 06, 1797 | J. Nazro | Improvement in making soap | |
| 147X | Jan. 06, 1797 | J. Nazro | Extracting alkali from marine salt and kelp | |
| 148X | Jan. 21, 1797 | C.W. Peale | Improvement in bridges | |
| 149X | Feb. 16, 1797 | J. Spence | Cutting and Heading Nails | nail making machines |
| 150X | Feb. 16, 1797 | J.F. Mangin | Cutting and Polsihing Marble | stonemason |
| 151X | Feb. 20, 1797 | J. McCallmont | Stoves | stoves |
| 152X | Feb. 20, 1797 | S. Mullikin | Scouring or Skinning Rice | miller |
| 153X | Feb. 24, 1797 | R. Stuart | Improvement in chimneys | household tools |
| 154X | Feb. 24, 1797 | J. Fowler | Improvement in bridges | |
| 155X | Feb. 24, 1797 | J. Kersey | Heading and Cutting Nails | nail making machines |
| 156X | Feb. 24, 1797 | L. Allwine | Improvement in mixing colours and painting |
Patent Database
Since 1790, millions of patents have been granted in the United States. The Directory of American Tool and Machinery Patents has created a database with every patent.
Did you know the third patent granted was used by George Washington?
During his first State of the Union, George Washington called on Congress to establish a patent system. Learn more about the first president's commitment to the "advancement of agriculture, commerce, and manufactures".
10 Facts about 18th-Century Patents