Patents Signed by George Washington

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

Patents Signed by George Washington

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