| Invention | Inventor | Year | Patent No. |
| A |
| Alternating Current Calculations | Charles Proteus Steinmetz | 1897 | |
| Alternator | Nikola Tesla | 1891 | US447,921 |
| Ampère's Law | André-Marie Ampère | 1820 | |
| Answering Machine | Willy Müller | 1935 | US2,816,167 |
| Arc Lamp | William Edwards Staite | 1834 | |
| B |
| Battery (Voltaic Pile) | Alessandro Volta | 1800 | |
| Beverage Antenna | Harold Beverage | 1921 | |
| Biconical Antenna | Oliver Lodge | 1898 | US609,154 |
| Bioelectricity/Bioelectrogenesis | Luigi Galvani | 1780s | |
| Biot-Savart Law | Jean Baptiste Biot
Felix Savart | 1820 | |
| C |
| Capacitor | Ewald Georg von Kleist | 1745 | |
| Car Radio | Paul Galvin
William Powell Lear | 1929
1930 |
US1,944,139 |
| Cassette Tape | Philips Company | 1962 | |
| Cathode Ray Tube (CRT) | Karl Ferdinand Braun | 1897 | |
| Cathode Rays | Julius Plücker | 1859 | |
| Cell Phone | Martin Cooper | 1973 | US3,906,166 |
| Citizens' Band Radio (CB) | Al Gross | 1948 | |
| CMOS (Complementary Metal-Oxide-Semiconductor) | Frank Wanlass (Fairchild Semiconductor) | 1963 | US3,356,858 |
| Coaxial Cable | Herman Affel
Lloyd Espenschied | 1929 | US1,835,031 |
| Color Television | Peter Goldmark
Alfred Schroeder | 1940
1947 | |
| Compactron | General Electric (GE) | 1961 | |
| Compact Disc (CD) | James T. Russell | 1965 | |
| Compass | China
| 350 AD | |
| Computer (Analytical Engine) | Charles Babbage | 1837 | |
| Conservation of Electric Charge | James Clerk Maxwell | 1865 | |
| Coulomb's Law | Charles-Augustin de Coulomb | 1787 | |
| CPU (Central Processing Unit) - Relay | Konrad Zuse | 1941 | |
| CPU (Central Processing Unit) - PC | Intel (8080) | 1974 | |
| Crookes Tube | William Crookes | c1875 | |
| Crystal Oscillator | Paul Langevin | 1917 | FR505,703 |
| Crystal Radio Receiver | Greenleaf Whittier Pickard | 1900 | US836,531 |
| Curie's Law | Pierre Curie | 1895 | |
| D |
| Daniell (Daniel) Cell | John Frederic Daniell | 1836 | |
| Darlington Pair | Sidney Darlington (Bell Laboratories) | 1953 | US2,663,806 |
| Diamagnetism | Michael Faraday | 1845 | |
| Differential Amplifier | Otto Herbert Schmitt | 1937 | Never Patented |
| Digital Camera | NASA | 1960s | |
| Digital Micromirror Device (DMD) | Larry Hornbeck
William E. Nelson | 1987 | |
| Digital TAD (Telephone Answering Device) | Kazuo Hashimoto | 1984 | US4,616,110 |
| Diode | John Ambrose Fleming | 1904 | US803,684
GB24,805 |
| Displacement Current | James Clerk Maxwell | 1865 | |
| Distributor | Frank Conrad
Arthur Atwater Kent | 1917
1920 | US1,219,704
US1,474,970 |
| Digital Light Processing (DLP) | Larry Hornbeck
William E. Nelson | 1987 | US4,710,732
US4,662,746 |
| DVD (Digital Video Disc) | Philips, Sony, Toshiba, Time-Warner, Matsushita Electric, Hitachi, Mitsubishi Electric, Pioneer, Thomson, JVC, IBM | 1995 | |
| E |
| Electric Car | Thomas Davenport | 1833 | US132 |
| Electric Charge | Thales of Miletus | 600 BC | |
| Electric Distribution System | Thomas Alva Edison | 1882 | US266,793 |
| Electric Field | Thales of Miletus | 600 BC | |
| Electric Motor | Michael Faraday | 1821 | |
| Electrical Generator (Dynamo) | Michael Faraday
Hippolyte Pixii | 1832
1832 | |
| Electric Guitar | Lloyd Loar | 1923 | |
| Electrolysis | Michael Faraday | 1832 | |
| Electrolytic Capacitor | Julius Edgar Lilienfeld | 1928 | US2,013,564 |
| Electromagnet | William Sturgeon | 1825 | |
| Electromagnetic / Magnetic Field | Hans Christian Oersted | 1820 | |
| Electromagnetic Induction (Faraday's Law) | Michael Faraday | 1831 | |
| Electromagnetism | James Clerk Maxwell | 1865 | |
| Electron | Joseph John (J.J.) Thomson | 1897 | |
| Electronic Ignition | Chrysler Corporation | 1970 | |
| Electron Charge (Oil-Drop Experiment) | Robert Millikan | 1909 | |
| Electron Gun | Karl Ferdinand Braun | 1897 | |
| Electroplating | Luigi V. Brugnatelli | 1805 | |
| EPROM (Erasable Programmable Read-Only Memory) | Dov Frohman (Intel) | 1971 | |
| F |
| Faraday Cage | Michael Faraday | 1836 | |
| Fax Machine / Facsimile | Alexander Bain | 1842 | |
| Faraday Effect | Michael Faraday | 1845 | |
| Ferromagnetism | Pierre Curie | 1895 | |
| FET - Field Effect Transistor | Julius Edgar Lilienfeld | 1928 | US1,745,175 |
| Filter | | | |
| Fluorescent Lamp | Edmund Germer &
Friedrich Meyer &
Hans J. Spanner | 1926 | US2,182,732 |
| FM Radio | Edwin Howard Armstrong | 1933 | US1,342,885 |
| Fuel Cell | Francis Thomas Bacon | 1932 | GB667,298 |
| Full Spectrum Lighting | John Ott | 1950s | US4,091,441 |
| G |
| Galvanic Cell | Luigi Galvani | 1780 | |
| Galvanometer | Johann S. Schweigger | 1822 | |
| Gauss's Law | Johann Carl Friedrich Gauss | 1867 | |
| Geiger Counter Tube | Hans (Johannes Wilhelm) Geiger &
Walther Müller (Mueller) | 1908 | |
| Geissler Tube | Heinrich Geissler | 1857 | |
| Global Positioning System (GPS) | U.S. Department of Defense (DOD) | 1960s | |
| Glow Plug | Ben Shereshaw
Ray Arden | 1946 | |
| H |
| Hall Effect | Edwin Hall | 1879 | |
| High-Temperature Superconductivity | Johannes Bednorz
Karl Müller | 1986 | |
| Hybrid Vehicle | Ferdinand Porsche | 1899 | |
| Hysteresis | James Alfred Ewing
Charles Proteus Steinmetz
| 1890
1891 | |
| I |
| Ignition Coil | Nikola Tesla | 1898 | US609,250 |
| Ignition System | Charles Kettering | 1911 | US1,150,523 |
| Incandescent Light Bulb | Thomas Alva Edison | 1879 | US223,898 |
| Inductor (Induction Coil) | Michael Faraday | 1831 | |
| Instrument Landing System (ILS) | Andrew Alford | 1951 | US2,682,050 |
| Integrated Circuit (Microchip) | Jack Kilby
Robert Noyce | 1961
1961 | US3,138,743
US2,981,877 |
| J |
| Joule's Law | James Prescott Joule | 1840 | |
| K |
| Kirchhoff's Laws | Gustav Kirchhoff | 1845 | |
| Klystron Tube | William Hansen&
Russell Varian &
Sigurd Varian | 1937
1937
1937 | US2,269,456 |
| L |
| Lenz's Law | Heinrich Friedrich Emil Lenz | 1834 | |
| Leyden Jar | Pieter van Musschenbroek | 1746 | |
| Lightning Rod | Benjamin Franklin | 1752 | |
| Liquid Crystal Display (LCD) | James Fergason | 1970 | US3,731,986 |
| Logic Gate | Charles Babbage
Almon Strowger
Nikola Tesla | 1837
1891
1898 |
US447,918
US613,809 |
| Lorentz Force Law | Hendrik Antoon Lorentz | | |
| Loudspeaker | Ernst Siemens
Sir Oliver Joseph Lodge | 1877
1898 | GB4685
Ger2355
GB9712 |
| M |
| Magnet (Lodestones) | Ancient Greece | 600 BC | |
| Magneto Ignition | Robert Bosch | 1898 | |
| Magnetohydrodynamics | Hannes Alfvén | 1970 | |
| Magnetostriction | James Prescott Joule | 1842 | |
| Maximum Power Theorem | Moritz von Jacobi | 1839 | |
| Maxwell's Equations | James Clerk Maxwell | 1865 | |
| Meissner Effect | Walter Meissner
Robert Ochsenfeld | 1933 | |
| Microphone | Emile Berliner | 1877 | US224,573 |
| Microwave Oven | Percy LaBaron Spencer | 1945 | US2,495,429 |
| Morse Code | Samuel Morse | 1840 | US1,647 |
| N |
| Neon Lamp | Georges Claude | 1910 | US1,125,476 |
| O |
| Ohm's Law | Georg Simon Ohm | 1827 | |
| Operational Amplifier | | | |
| Oudin Coil | Paul Marie Oudin
Jacques d'Arsonval | 1898
1898 | |
| P |
| Pager | Al Gross | 1949 | |
| Paramagnetism | Pierre Curie | 1895 | |
| Phonograph | Thomas Alva Edison | 1877 | US200,521 |
| Photoelectric Effect | Alexandre Edmond Becquerel | 1839 | |
| Photoresistor | | | |
| Photovoltaic Cell (Solar Cell) | Russell Ohl | 1946 | US2,402,662 |
| Piezoelectricity | Pierre Curie
Jacques Curie | 1880 | |
| Potentiometer (Rheostat) | Sir Charles Wheatstone | 1840 | |
| Push-Pull Amplifier | Edwin H. Colpitts | 1912 | |
| Pyroelectricity | Theophrastus | 314 BC | |
| R |
| Radar (RAdio Detection and Ranging) | Christian Huelsmeyer | 1904 | US810,150 |
| Radio | Guglielmo Marconi | 1901 | GB12039
GB7777
US763,772 |
| Radio Frequency (RF) Generator | Ernst Alexanderson | 1909 | US1,008,577 |
| Radio Telescope | Grote Reber | 1937 | |
| Radio Waves (RF) | James Clerk Maxwell | 1865 | |
| Regenerative Circuit | Edwin Armstrong | 1914 | US1,113,149 |
| Relay | Joseph Henry | 1835 | |
| Remote Control | Nikola Tesla
Zenith
Robert Adler | 1898
1950
1956 | US613,809
US2,817,025 |
| Resistance | Georg Simon Ohm | 1827 | |
| Resistor | | | |
| S |
| Schottky Diode | Walter H. Schottky | 1938 | |
| Semiconductor | Russell S. Ohl | 1940 | |
| Silicon | Antoine Lavoisier | 1787 | |
| Silicon-Controlled Rectifier (SCR) | General Electric (GE) | 1958 | |
| SI Electricity/Magnetism Units | 11th General Conference on Weights and Measures | 1960 | |
| Solar Cell (Silicon) | Russell Ohl | 1941 | US2,402,662 |
| Spark Plug | Nikola Tesla
Richard Simms
Robert Bosch | 1898
1898
1898 | US609,250
GB24859
GB26907 |
Special Relativity for Beginners
Special Relativity | Albert Einstein | 1905 | |
| Superconductivity | Heike Kamerlingh Onnes | 1911 | |
| T |
| Tape Recorder (magnetic) | Semi Joseph Begun | 1934 | US2,048,487
US2,048,488 |
| Telegraph | Samuel Morse | 1838 | US1,647 |
| Telephone | Alexander Graham Bell | 1876 | US174,465 |
| Telephone Switching System (Telephone Exchange) | Almon Strowger | 1889 | US447,918 |
| Television | Vladimir Kosma Zworykin
John Logie Baird
Philo Taylor Farnsworth | 1923
1924
1927 | US2,141,059
US1,773,980 |
| Tesla Coil | Nikola Tesla | 1891 | US454,622
US514,168 |
| Thermistor | Samuel Ruben | 1930 | US2,021,491 |
| Thermoelectricity | Thomas Johann Seebeck
Jean Peltier | 1821
1834 | |
| Torsion Balance | John Michell
Charles-Augustin de Coulomb | 1750
1777 | |
| Touch Screen Technology | Sam Hurst | 1974 | US3,662,105
US3,798,370 |
| Transistor (Bipolar Junction Transistor - BJT) | John Bardeen &
William Shockley &
Walter Brattain | 1947 | US2,524,035
US2,569,347 |
| Transistor Radio | Richard C. Koch (Industrial Development Engineering Associates) | 1955 | US2,892,931 |
| Transformer | William Stanley | 1886 | US349,611 |
| Triac (TRIode for Alternating Current) | General Electric (GE) | 1960s | |
| Triboelectric Effect | Thales of Miletus | 600 BC | |
| Tunnel Diode (Esaki) | Leo Esaki (Sony) | 1958 | US4,198,644 |
| V |
| Vacuum | Galileo Galilei
Evangelista Torricelli
Blaise Pascal | 1594
1643
1647 | |
| Vacuum Tube (Audion, Triode) | Lee De Forest | 1906 | US879,532 |
| Van de Graaf Generator | Robert Jemison Van de Graaff | 1929 | US1,991,236 |
| Very Large Scale Integrated Circuits (VLSI) | Carver Mead | 1969 | |
| Video Cassette Recorder (VCR) | Sony | 1971 | |
| W |
| Walkie Talkie | Al Gross
Henryk Magnuski | 1938
1940 | |
| Walkman | RCA / Sony | 1979 | |
| Wheatstone Bridge | Samuel Hunter Christie
Sir Charles Wheatstone | 1833
1843 | |
| WiTricity | Marin Soljačić | 2007 | |
| X |
| X-rays | Wilhelm Conrad Rontgen | 1895 | |
| X-ray Tube | Wilhelm Roengten | 1895 | |
| Y |
| Yagi-Uda Antenna | Shintaro Uda | 1926 | |
| Z |
| Zener Diode | Clarence Melvin Zener | 1915 | |
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