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	Browse inventors by last name: Macdougall , John D. Method of Making Insulated Gate Field Effect Transistor with Controlled Threshold Voltage John Macdougall is one of the inventors of the first commercially viab . . . . Macomber , Stanley Open Web Joist In 1912, Stanley Macomber became city engineer for Centralia, Washingt . . . . Maiman , Theodore Harold Laser Physicist Theodore Harold Maiman invented the first operable laser. While employed at . . . . Manchester , Kenneth E. Method of Making Insulated Gate Field Effect Transistor with Controlled Threshold Voltage Kenneth Manchester is a pioneer in the development of ion implantation . . . . Mannes , Leopold Color Photography Created a practical film for color photography, and its ease of use an . . . . Mansfield , Peter Magnetic Resonance Imaging Marconi , Guglielmo Radio In 1895 Italian inventor Guglielmo Marconi built the equipment and tra . . . . Marrison , Warren Frequency Control System In the early 20th century, as telephone wires carried more messages an . . . . Martin , Homer Z. Catalytic Cracking Homer Martin was with Exxon Research & Engineering Co. (ER&E) . . . . Mason , John Mason jar Matzeliger , Jan Shoe-lasting machine Mauchly , John ENIAC Maurer , Robert D. Optical Fibers Corning Glass researchers Robert Maurer, Donald Keck, and Peter Schult . . . . Maxim , Hiram Maxim gun; smokeless gunpowder Maybach , Wilhelm Explosion and Combustion Motor Mazor , Stanley CPU In the late 1960s, many articles had discussed the possibility of a co . . . . McCormick , Cyrus Hall Mechanical Reaper Cyrus Hall McCormick invented the mechanical reaper, which combined al . . . . McCoy , Elijah Automatic Engine Lubricator Elijah McCoy received his first patent for an automatic lubricating de . . . . McIntire , Otis Ray Styrofoam Brand Foam Manufacture of Cellular Thermoplastic Products McLean , Malcom Containerized Shipping Apparatus for Shipping Freight McMaster , Harold Tempered Glass Glass Tempering System Including Oscillating Roller Furnace Mead , Carver A. Processor Which Sequences Externally of a Central Processor Carver Mead is an inventor, chip designer, entrepreneur, and universit . . . . Mergenthaler , Ottmar Linotype Ottmar Mergenthaler's invention of the linotype composing machine in 1 . . . . Merkle , Ralph Cryptographic Apparatus and Method Ralph Merkle realized public-key cryptography (PKC) was possible in 19 . . . . Metcalfe , Robert M. Ethernet Michelson , Gary K. Apparatus for Use in Inserting Spinal Implants Orthopedic spinal surgeon Gary Michelson has a portfolio of over 250 U . . . . Midgley Jr. , Thomas Ethyl Gasoline Knock was a destructive phenomenon that occurred in internal combustio . . . . Miles , Alexander Improved Method for Opening and Closing Elevators Miller , Lewis Combine harvester Millman , Irving Vaccine for Hepatitis B Baruch Blumberg discovered an antigen in 1963 that detected the presen . . . . Mirowski , Michel Implantable Heart Defibrillator Michel Mirowski conceived of the automatic implantable cardioverter de . . . . Moeller , Dennis Peripherals Dennis Moeller and Mark Dean together created a microcomputer system w . . . . Molloy , Bryan B. Prozac Bryan Molloy and Klaus Schmiegel co-invented a class of aryloxyphenylp . . . . Montagnier , Luc HIV Virus Isolation and Diagnosis Dr. Luc Montagnier is best known for his 1983 discovery of the Human I . . . . Moog , Robert A. Moog Synthesizer Moore , Gordon E. Method for Fabricating Transistors As a cofounder of both Fairchild Semiconductor and Intel, Gordon Moore . . . . Morgan , Garrett The Gas Mask and the Three-way Traffic Signal Garrett Morgan invented the gas mask and three-way traffic signal in t . . . . Morse , Samuel F. B. Telegraph Morse developed 'lightning wires' and 'Morse code,' an electronic alph . . . . Mower , Morton Implantable Heart Defibrillator Morton Mower co-invented the automatic implantable cardioverter defibr . . . . Moyer , Andrew J. Penicillin Andrew J. Moyer's discoveries provided the foundation for the industri . . . . Moyroud , Louis Marius Photo Composing Machine Louis Marius Moyroud and Rene Alphonse Higonnet developed the first pr . . . . Mullis , Kary Polymerase Chain Reacton The polymerase chain reaction, which was devised by Kary Mullis, has r . . . . Murphree , Eger V. Catalytic Cracking Eger Murphree, former president of Exxon Research & Engineering Co . . . . Murphy Jr. , William Disposable Medical Trays Disposable Medical Trays Murray , Thomas E. Improvements in Electric System Safety Thomas E. Murray was an American inventor, entrepreneur, and influenti . . . . Muybridge , Eadweard Method and Apparatus for Photographing Objects in Motion Eadweard Muybridge made three major achievements in photography: first . . . .