Copyright 1992, Thomas J. Perkowksi, Esq., P.C., All Rights Reserved
"Know the reason for your birth and leave your imprint on the world"
-- Anonymous
Pioneer U.S. Letters Patents
PATENT NO. TITLE OF INVENTION INVENTOR ISSUE DATE
Cotton Gin
Eli Whitney March 14, 1794
Improvements in Machines for Reaping Small Grain
Cyrus McCormick June 21, 1834
Improvements in Fire Arms and in the Apparatus Used Therewith
1,304 Samuel Colt August 29, 1839
1,622 Improvement in the Electro-Magnetic Telegraph Charles Wheatstone, et al. June 10, 1842
1,647 Telegraph Signs Samuel F.B. Morse June 20, 1840
1,735 Improvement in Electro-Magnetic Machines etc. Truman Cook August 25, 1840
1,758 Improvement in Machines for Cutting Veneers John Dresser September 3, 1840
2,252 Improvement in the Construction of Vessels or Apparatus for Preserving Paint John Rand September 11, 1841
2,275 Machine for Sticking Pins into Papers Samuel Slocum September 30, 1841
3,630 Door-Lock Linus Yale June 13, 1844
3,633 Improvement in India-Rubber Fabrics Charles Goodyear June 15, 1844
4,710 Anchoring Suspension-Chains for Bridges Jonathan A. Roebling August 26, 1846
4,750 Improvement in Sewing Machines Elias Howe September 10, 1846
4,945 Apparatus for Passing Suspension-Wires for Bridges Across Rivers Jonathan A. Roebling January 26, 1847
5,171 Improvement in Photographic Pictures William H. Fox Talbot,
et al.		 June 26, 1847
6,281 Dress-Pin Walter Hunt April 10, 1849
8,080 Improved Process for the Artificial Production of Ice John Gorrie May 6, 1851
8,294 Improvement in Sewing Machines Isaac Singer August 12, 1851
16,082 Manufacture of Iron and Steel Henry Bessemer November 11, 1856
22,186 Improvement in Screw-Neck Bottles John L. Mason November 30, 1858
31,128 Improvements in Hoisting Apparatus E.G. Otis January 15, 1861
36,836 Improvement in Revolving Battery Guns Richard Gatling November 4, 1862
46,454 Improvement in Plows John Deere February 21, 1865
Re. 5,799 Improvement in Explosive Compounds Alfred Noble May 26, 1868
79,265 Improvement in Type-Writing Machines C. Latham Sholes, et al. June 23, 1868
94,005 Improved Washing-Machine Alexander King, et al. August 24, 1869
112,254 Improvement in Rock Drills Simon Ingersoll February 28, 1871
123,005 Improvement in Telegraph Apparatus Thomas A. Edison January 23, 1872
135,245 Improvement in Brewing Beer and Ale Louis Pasteur January 28, 1873
Re. 5,504 Improvement in Steam-Power Brake Devices George Westinghouse, Jr. July 29, 1873
151,468 Improvement in Gas-Engines George B. Brayton June 2, 1872
157,124 Improvement in Wire Fences Joseph Glidden November 24, 1874
174,465 Improvement in Telegraphy Alexander G. Bell March 7, 1876
194,047 Improvements in Gas-Motor Engines Nicolaus Otto August 14, 1877
199,612 Improvements in Carpet-Sweepers Melville R. Bissell January 29, 1878
200,521 Improvement in Phonographic or Speaking Machine Thomas A. Edison February 19, 1878
206,112 Improvement in Composition Floors, Roofs, Pavements & etc. Thaddeus Hyatt July 16, 1878
DE 11,023 Design for a Statue Auguste Bartholdi February 18, 1879
212,000 Improvement in Vegetable-Assorters John H. Heinz February 4, 1879
221,360 Improvement in Cash Register and Indicator James Ritty, et al. November 4, 1879
223,898 Electric Lamp Thomas A. Edison January 27, 1880
235,199 Apparatus for Signaling and Communicating Called "Photophone" Alexander G. Bell December 7, 1880
317,828 Machine for Producing Printed Bars Ottmar Mergenthaler May 12, 1885
324,899 Electric Railway Charles J. Van Depoele August 25, 1885
328,710 Rotary Motor Charles A. Parsons October 20, 1885
344,542 Dynamo-Electric Machine Charles A. Parsons June 29, 1886
372,786 Gramophone Emile Berliner November 8, 1887
381,968 Electro-Magnetic Motor Nikola Tesla May 1, 1888
388,116 Calculating Machine William S. Burroughs August 21, 1888
388,850 Camera George Eastman September 4, 1888
392,046 Pen John J. Loud October 30, 1888
395,783 Apparatus for Compiling Statistics Herman Hollerith January 8, 1889
400,766 Process of Reducing Aluminum by Electrolysis Charles M. Hall April 2, 1889
426,315 Brick-Machine James W. Penfield, et al. April 22, 1890
430,804 Electrical Calculating System Herman Hollerith June 24, 1890
431,952 Machine for Cutting Veneers Gustav Oncken July 8, 1890
435,995 Wheel-Tire for Cycles John Boyd Dunlop September 9, 1890
447,918 Automatic Telephone-Exchange Almon B. Strowger March 10, 1891
452,894 Workman's Time-Recorder Willard Le Grand Bundy May 26, 1891
472,670 Submergible Torpedo-Boat John P. Holland April 12, 1892
Re. 11,232 Process of Extracting Bromine Herbert H. Dow April 12, 1892
479,864 Elevator George Wheeler August 2, 1892
504,038 Clasp Locker or Unlocker for Shoes Whitcomb L. Judson August 29, 1893
533,244 System of Distribution by Alternating Currents Charles Steinmetz January 29, 1895
548,587 Machine for Blowing Glass Michael J. Owens October 22, 1895
549,160 Road-Engine George B. Seldon November 5, 1895
568,176 Apparatus for Producing Electric Currents of High Frequency and Potential Nikola Telsa September 22, 1896
586,193 Transmitting Electrical Signals Guglielmo Marconi July 13, 1897
589,168 Kinetographic Camera Thomas A. Edison August 31, 1897
608,845 Internal-Combustion Engine Rudolph Diesel August 9, 1898
609,154 Electric Telegraphy Oliver J. Lodge August 16, 1898
621,195 Navigable Balloon Ferdinand Graf Zeppelin March 14, 1899
635,919 Apparatus for Generating Mechanical Power Charles Curtis October 31, 1899
644,077 Acetyl Salicylic Acid Felix Hoffman February 27, 1900
645,612 Method of Distributing Energy George Westinghouse March 20, 1900
686,046 Motor-Carriage Henry Ford November 5, 1901
775,134 Razor King C. Gillette November 15, 1904
808,897 Apparatus for Treating Air Willis H. Carrier January 2, 1906
821,393 Flying-Machine Orville Wright, et al. May 22, 1906
841,387 Device for Amplifying Feeble Electrical Currents Lee De Forest January 15, 1907
865,367 Fluorescent Electric Lamp Thomas A. Edison September 10, 1907
873,007 Microscope Edward Bausch December 10, 1907
874,008 Traction-Engine Benjamin Holt December 17, 1907
879,532 Space Telegraphy Lee De Forest Fenruary 18, 1908
889,823 Carpet Sweeper and Cleaner James M. Spangler June 2, 1908
895,729 Art of Separating Suspended Particles from Gaseous Bodies Frederick Cottrell August 11, 1908
938,316 Process and Apparatus for the Production of Compounds of Oxygen and Nitrogen Fritz Haber, et al. October 26, 1909
942,699 Method of Making Insoluble Products of Phenol and Formaldehyde Leo H. Baekeland December 7, 1909
971,501 Production of Ammonia Fritz Haber, et al. September 27, 1910
1,005,186 Transmission Mechanism Henry Ford October 10, 1911
1,008,577 High-Frequency Alternator Ernst F. W. Alexanderson November 14, 1911
1,030,178 Apparatus for the Electrical Production of Light Peter Cooper Hewitt June 18, 1912
1,049,667 Manufacture of Gasoline William M. Burton January 7, 1913
1,103,503 Rocket Apparatus Robert H. Goddard July 14, 1914
1,115,674 Brassiere Mary P. Jacob November 3, 1914
1,150,311 Ship's Gyroscope Elmer A. Sperry August 17, 1915
1,150,523 Engine-Starting Device Charles F. Kettering August 17, 1915
1,171,055 Engine Starting, Lighting System and Ignition Charles F. Kettering February 8, 1916
1,197,256 Cutlery Harry Brearley September 5, 1916
1,203,495 Vacuum-Tube William D. Collidge October 31, 1916
1,243,705 Method of and Means for Transmitting Signals John R. Carson October 23, 1917
1,279,671 Propelling Mechanism for Tractors Joseph M. Denning September 24, 1918
1,342,885 Method of Receiving High-Frequency Oscillations Edwin H. Armstrong June 8, 1920
1,442,426 Sound Controlled Means for Producing Light Variations Lee De Forest January 16, 1923
1,447,773 Radio Transmission Control System Lloyd Espenschied, et al. March 6, 1923
1,650,257 Brake Vincent Bendix November 22, 1927
Re.17,245 Method of Maintaining Electric Currents of Constant Frequency Walter G. Cady March 26, 1929
1.716,033 Method of Producing Talking-Motion-Picture Films and Apparatus Used Therefor Lee De Forest June 4, 1929
1,773,079 Method of Preparing Food Products Clarence Birdseye August 12,1930
1,773,980 Television System Philo T. Farnsworth August 26, 1930
1,781,092 Concentric Conducting System Herman A. Affel, et al. November 11, 1930
1,790,620 Hydraulic Steering Mechanism Francis Wright Davis January 27, 1931
1,835,031 Concentric Conducting System Lloyd Espenschied, et al. December 8, 1931
1,835,031 Process for the Manufacture of Liquid Fuels Eugene Houdry December 22, 1931
Plant Patent 115 Peach Luther Burbank April 5, 1932
1,948,384 Method and Apparatus for the Acceleration of Ions Ernesto Laurence February 20, 1934
2.026,082 Board Game Apparatus Charles B. Darrow December 31, 1935
2,058,761 Apparatus for Testing Acidity Arnold O. Beckman, et al. October 27, 1936
2,058,914 Apparatus for Producing Images of Objects Reinhold Ruedenberg October 27, 1936
2,071,250 Linear Condensation Polymers Wallace H. Carothers February 16, 1937
2,102,671 Wave Translation System Harold S. Black April 22, 1932
2,121,142 System for the Artificial Production of Vocal or Other Sounds Homer W. Dudley June 21, 1938
2,133,235 Method and Apparatus for Making Glass Wool Games Slayter October 11, 1938
2,133,238 Glass Fabric Games Slayter October 11, 1938
2,141,059 Television System Vladmir K. Zworykin, et al. December 20, 1938
2,153,729 Thiobarbituric Acid Derivatives Ernest H. Volwiler, et al. April 11, 1939
2,221,776 Electron Photography Carlson Chester F. Carlson November 19, 1940
2,230,654 Tetrafluoroethylene Polymers Roy J. Plunkett February 4, 1941
2,242,275 Electrical Translating System and Method Russel H. Varian May 20, 1941
2,244,500 Telephone System Harry Nyquist June 3, 1941
2,255,868 System and Apparatus for Facsimile Telegraph Raleigh J. Wise, et al. September 16, 1941
2,268,872 Variable Frequency Oscillation Generator William R. Hewlett January 6, 1942
2,269,456 Electron Beam Oscillator William Hansen, et al. January 14, 1942
2,297,691 Electrophotography Chester F. Carlson October 6, 1942
2,318,259 Direct-Lift Aircraft Igor I. Sikorsky May 4, 1943
2,351,004 Method and Means of Magnetic Recording Marvin Camras June 13, 1944
2,404,199 2-Sulphanilamido-Quinox-aline John Weijlard, et al. July 16, 1946
2,408,809 Cathode Beam Tube and Velocity Control Electrode John R. Pierce October 8, 1946
2,443,989 Method for Production of Penicillin Andrew J. Moyer June 22, 1948
2,478,903 Stroboscope Harold E. Edgerton August 16, 1949
2,480,208 Radio Distance and Direction Indicator Luis W. Alvarez August 30, 1949
2,495,429 Method of Treating Foodstuffs Percy L. Spencer January 24, 1950
2,524,035 Three-Electrode Circuit Element Utilizing Semi-conductive Materials John Bardeen, et al. October 3, 1950
2,528,730 Sonic Picture System Robert H. Rines November 7, 1950
2,542,823 Short-wave Broadcast Net Frederick W. Lyle February 20, 1951
2,543,181 Photographic Product Comprising a Rupturable Container Carrying a Photographic Processing Liquid Edwin H. Land February 27, 1951
2,561,489 Method and Means for Chemical Analysis for Nuclear Inductions Felix Bloch, et al. July 24, 1951
2,569,347 Circuit Element Utilizing Semi-conductive Material William Shockley September 25, 1951
2,592,556 Gaseous-Dischare Device Kennth J. Germeshausen April 15, 1952
2,616,626 Calculator Clair D. Lake, et al. November 4, 1952
Re. 23,579 Communication System Employing Pulse Code Modulation John R. Pierce November 11, 1952
2,682,050 Localizer Antenna System Andrew Alford June 22, 1954
2,696,522 Visual Reproduction of Distant Objects Robert H. Rines January 22, 1944
2,699,054 Tetracycline Lloyd H. Conover January 11, 1955
2,708,656 Neutronic Reactor Enrico Fermi, et al. May 17, 1955
2,708,722 Pulse Transfer Controlling Device An Wang, et al. May 17, 1955
2,711,534 Electric System Robert H. Rines June 21, 1955
2,721,271 Radio Frequency Mass Spectrometer Willard H. Bennett October 18, 1955
2,736,880 Multicoordinate Digital Information Storage Device Jay W. Forester February 28, 1956
2,744,122 Delta4-19-NOR-17alpha-e-thinylandrosten-17 beta-ol-3-one and process Carl Djjerassi, et al. May 1, 1956
2,752,790 Gyroscopic Apparatus Charles S. Draper July 3, 1956
2,769,975 Electromagnetic Object Tracking and Destroying Method and System Robert H. Rines November 6, 1956
2,790,362 Photo Composing Machine Rene Higonnet, et al. April 30, 1957
2,835,548 Satellite Structure Robert C. Baumann May 20, 1958
2,879,439 Production of Electromagnetic Energy Charles H. Townes March 24, 1959
2,911,759 Manufacture of Flat Glass Lionel A.B. Pilkington, et al. November 10, 1959
2,929,922 Masers and Maser Communication Systems Authur L. Schawlow, et al. March 22, 1960
2,956,114 Broad Band Magnetic Tape System and Method Charles P. Ginsburg, et al. October 11, 1960
2,971,323 Electronically-Controlled Timepiece Max Hetzel February 14, 1961
2,981,877 Semiconductor Device-And-Lead Structure Robert N. Noyce April 25, 1961
3,011,057 Radiation Image Device Hal. O. Anger November 28, 1961
3,057,356 Medical Cardiac Pacemaker Wilson Greatbath October 9, 1962
3,058,106 Space Satellites for Use as Radio System Repeaters Cassius C. Cutler October 9, 1962
3,093,346 Space Capsule Maxime A. Faget, et al. June 11, 1963
3,140,249 Catalytic Cracking of Hydrocarbons with a Crystalline Zeolite Catalyst Composite Charles J. Plant, et al. July 7, 1964
3,228,831 Compositions and Method for Treating Symptoms of Inflammation, Pain, and Fever John Stuart Nicholson, et al. January 11, 1966
3,535,415 Ruby Laser System Theodore H. Maiman November 14, 1967
3,371,085 5-Aryl-3H-1,4-Benzodiaz epin-2(1H)-one Earl Reeder, et al. February 27, 1968
3,387,286 Field-Effect Transister Memory R.H. Dennard June 4, 1968
3,492,131 Peptide Sweetening Agents James M. Schlatter January 27, 1970
3,506,327 Wavefront Reconstruction Using a Coherent Reference Beam Emmett N. Leith, et al. April 14, 1970
3,543,007 Automatic Car Identification System Emil F. Brinker, et al. November 24, 1970
3,589,363 Material Removal Apparatus and Method Employing High Frequency Vibrations Anton Banko, et al. June 29, 1971
3,625,711 Cyclamate-free Artificial Sweetener Marvin E. Eisenstadt December 7, 1971
3,641,591 Soft Shell Mushroom Shaped Heart Willem J. Kolff February 15, 1972
3,700,193 A Method for Delivering a Vehicle to Earth Orbit and Returning the Reusable Portion Thereof to Earth Raymond H. Bradley October 24, 1972
3,723,710 Method and Device for Reading and Decoding a High Density Self-Clocking Bar Code William G. Crouse, et al. March 27, 1973
3,789,832 Apparatus and Method for Detecting Cancer in Tissue Raymond V. Damadian February 5, 1974
3,792,322 Buried Channel Charge Coupled Devices Willard Sterling Boyle, et al. February 12, 1974
Re. 28,507 Television Gaming Apparatus William T. Rusch August 5, 1975
3,955,088 Position Imaging Device with Plural Coincidence Channels and Graded Radiation Absorption Gerd Muehllehner, et al. May 4, 1976
4,024,271 Pharmacologically Active Guanidine Compounds Graham J. Durant, et al. May 17, 1977
4,153,349 Soft Contact Lens with Thin Edge Otto Wichterle May 8, 1979
4,334,158 Superconductor Switch and Amplifier Device Sadeg M. Faris June 8, 1982
4,343,993 Scanning Tunneling Microscope Gerd Binnig, et al. August 10, 1982
4,348,553 Parallel Pattern Verifier with Dynamic Time Warping James K. Baker, et al. September 7, 1987
4,665,913 Method for Opthalmological Surgery Francis A. L'Esperance May 19, 1987
4,683,202 Process for Amplifying Nucleic Acid Sequences Kary B. Mullis July 28, 1987
4,704,583 Light Amplifiers Employing Collisions to Produce a Population Inversion Gordon Gould November 3, 1987
4,708,818 Human Immunodeficiency Viruses Associated with Acquired Immune Deficiency Syndrome (AIDS) A Diagnostic Method for AIDS, and PRE-AIDS, and a Kit Therefor Luc Montagnier, et al. November 24, 1987
4,740,470 Biologically Functional Molecular Chimeras Stanley N. Cohen, et al. April 26, 1988
4,789,794 Time Domain Reflectometer Stephen Whiteley, et al. December 6, 1988
4,809,133 Low Temperature Monolithic Chip Sadeg M. Faris February 28, 1989
4,942,516 Single Chip Integrated Circuit Computer Architecture Gilbert P. Hyatt July 17, 1990