Long trussInvention · Timber bridge truss system developed by Stephen H. Long (placed at Hopkinton (where Stephen Harriman Long was born))Invented or discovered by: Stephen Harriman Long.https://en.wikipedia.org/wiki/Long_truss
LoudspeakerInvention · Converts an electrical audio signal into a corresponding sound (placed at Vineland (where Edward Washburn Kellogg was born))Invented or discovered by: Edward Washburn Kellogg, Chester Williams Rice.https://en.wikipedia.org/wiki/Loudspeaker
MaserInvention · Device for producing coherent EM waves in the sub-visible spectrum (placed at Greenville (where Charles Hard Townes was born))Invented or discovered by: Charles Hard Townes, James Power Gordon, Herbert Zeiger. Discovered or invented: 1953.https://en.wikipedia.org/wiki/Maser
MemristorInvention · Nonlinear two-terminal fundamental circuit element (placed at Philippines (where Leon O. Chua was born))Invented or discovered by: Leon O. Chua.https://en.wikipedia.org/wiki/Memristor
Microwave ovenInvention · Kitchen cooking appliance (placed at Waltham (Raytheon headquarters))Invented or discovered by: Philippe Siguret. Discovered or invented: 1945. Made in: Raytheon.https://en.wikipedia.org/wiki/Microwave_oven
Moses G. FarmerAmerican electrical engineer and inventor (1820–1893) (placed at Boscawen)A fire alarm box is an outdoor device used for notifying a fire department of a fire. Early boxes used the telegraph system and were the main method of calling the fire department to a neighborhood in the days before people had telephones. When the box is triggered, a spring-loaded wheel spins and thttps://en.wikipedia.org/wiki/Moses_G._Farmer
NapalmInvention · Gelled incendiary mixture (placed at Columbus (where Louis Fieser was born))Invented or discovered by: Louis Fieser.https://en.wikipedia.org/wiki/Napalm
Neal E. MillerAmerican psychologist and academic (1909–2002) (placed at Milwaukee)Biofeedback is a form of alternative medicine that involves measuring a subject's quantifiable bodily functions such as blood pressure, heart rate, skin temperature, sweat gland activity, and muscle tension, conveying the information to the patient in real-time. This raises the patient's awareness ahttps://en.wikipedia.org/wiki/Neal_E._Miller
OscilloscopeInvention · Instrument for displaying time-varying signals (placed at Fulda (where Karl Ferdinand Braun was born))Invented or discovered by: Karl Ferdinand Braun.https://en.wikipedia.org/wiki/Oscilloscope
Paul C. FisherAmerican inventor and politician (1913–2006) (placed at Lebanon)The Space Pen, also known as the Zero Gravity Pen, is a pen that uses pressurized ink cartridges and is claimed to write in zero gravity, upside down, underwater, over wet and greasy paper, at any angle, and in extreme temperature ranges. The ballpoint is made from tungsten carbide and is precisely https://en.wikipedia.org/wiki/Paul_C._Fisher
PhonographInvention · Device for analogue recording of sound (placed at New York City)Invented or discovered by: Thomas Edison. Discovered or invented: 1877. Made in: New York City.https://en.wikipedia.org/wiki/Phonograph
PhonometerInvention · Instrument used to measure the force of the human speaking voice (placed at Milan (where Thomas Edison was born))Invented or discovered by: Thomas Edison.https://en.wikipedia.org/wiki/Phonometer
Post-it noteInvention · Small piece of paper with a re-adherable strip of glue on its back (placed at San Antonio (where Spencer Silver was born))Invented or discovered by: Spencer Silver.https://en.wikipedia.org/wiki/Post-it_note
Ransom E. OldsAmerican businessman (1864–1950) (placed at Geneva)Used globally around the world, an assembly line is a manufacturing process in which interchangeable parts are added to a product in a sequential manner in order to create a finished product more quickly than with older methods. This type of manufacturing greatly reduces the amount of time taken to https://en.wikipedia.org/wiki/Ransom_E._Olds
Richard T. WhitcombAmerican aeronautical engineer (1921–2009) (placed at Evanston)A supercritical airfoil is an airfoil designed, primarily, to delay the onset of wave drag on aircraft in the transonic speed range. Supercritical airfoils are characterized by their flattened upper surface, highly cambered aft section, and greater leading edge radius as compared to traditional airfhttps://en.wikipedia.org/wiki/Richard_T._Whitcomb
Robert N. HallAmerican engineer and applied physicist (placed at New Haven)A laser diode is a laser where the active medium is a semiconductor similar to that found in a light-emitting diode. The most common and practical type of laser diode is formed from a p-n junction and powered by injected electric current. These devices are sometimes referred to as injection laser dihttps://en.wikipedia.org/wiki/Robert_N._Hall
Royal Earl HouseAmerican inventor (1814–1895) (placed at Rockingham)The printing telegraph is a derivative of the electrical telegraph which links two 28-key piano-style keyboards by electrical wire representing a letter of the alphabet and when pressed causing the corresponding letter to print at the receiving end. The receiver would then receive the instantly readhttps://en.wikipedia.org/wiki/Royal_Earl_House
Safety pinInvention · Variation of regular pin used to fasten piece of clothes and textile (placed at New York (where Walter Hunt was born))Invented or discovered by: Walter Hunt.https://en.wikipedia.org/wiki/Safety_pin
SegwayInvention · Two-wheeled, self-balancing personal vehicle (placed at Long Island (where Dean Kamen was born))Invented or discovered by: Dean Kamen.https://en.wikipedia.org/wiki/Segway
TeleforceInvention · Proposed defensive weapon by Nikola Tesla (placed at Nikola Tesla Memorial Center (where Nikola Tesla was born))Invented or discovered by: Nikola Tesla.https://en.wikipedia.org/wiki/Teleforce
TelephoneInvention · Telecommunications device (placed at Gelnhausen (where Johann Philipp Reis was born))Invented or discovered by: Johann Philipp Reis, Elisha Gray, Alexander Graham Bell, Antonio Meucci. Discovered or invented: 1876.https://en.wikipedia.org/wiki/Telephone
TeleprompterInvention · Display device that provides visual cues to a speaker (placed at St. Louis (where Hubert Schlafly was born))Invented or discovered by: Hubert Schlafly.https://en.wikipedia.org/wiki/Teleprompter
TelesemeInvention · Pre-telephone hotel signaling device (placed at New York City (where F. Benedict Herzog was born))Invented or discovered by: F. Benedict Herzog. Discovered or invented: 1880.https://en.wikipedia.org/wiki/Teleseme
TelevisionInvention · Medium for transmitting moving images and sound (placed at Dayton (where Charles Francis Jenkins was born))Invented or discovered by: Charles Francis Jenkins, Philo Farnsworth, Kenjirō Takayanagi, John Logie Baird.https://en.wikipedia.org/wiki/Television
Tesla coilInvention · Electrical resonant transformer circuit invented by Nikola Tesla (placed at Columbia University)Invented or discovered by: Nikola Tesla. Discovered or invented: 1891. Made in: Columbia University.https://en.wikipedia.org/wiki/Tesla_coil
ThermostatInvention · Temperature control system (placed at Leicester (where Warren Seymour Johnson was born))Invented or discovered by: Warren Seymour Johnson.https://en.wikipedia.org/wiki/Thermostat
Thomas AhearnCanadian inventor and businessman (1855–1938) (placed at Ottawa)An electric stove is a large kitchen appliance that converts electricity into heat in order to cook and bake food. In addition to heated coils atop a stovetop range, glass-ceramic cooktops and induction stoves using electromagnetic induction have proven to be popular in commercial kitchens as well ahttps://en.wikipedia.org/wiki/Thomas_Ahearn
Thomas J. FogartyAmerican surgeon and inventor (1934–2025) (placed at Cincinnati)A centrifugal clutch is a clutch that uses centrifugal force to connect two concentric shafts, with the driving shaft nested inside the driven shaft. The input of the clutch is connected to the engine crankshaft while the output may drive a shaft, chain, or belt. As engine RPM increases, weighted arhttps://en.wikipedia.org/wiki/Thomas_J._Fogarty
Tracy HallAmerican chemist (placed at Ogden)Synthetic diamonds are diamonds produced in a technological process as opposed to natural diamonds, which are created in geological processes. Synthetic diamonds are also widely known as HPHT diamonds or CVD diamonds, HPHT and CVD being the production methods, high-pressure high-temperature synthesihttps://en.wikipedia.org/wiki/Tracy_Hall
Ub IwerksAmerican animator, producer and special effects technician (1901–1971) (placed at Kansas City)The multiplane camera is a special motion picture camera used in the traditional animation process that moves a number of pieces of artwork past the camera at various speeds and at various distances from one another, creating a three-dimensional effect, although not stereoscopic. Various parts of thhttps://en.wikipedia.org/wiki/Ub_Iwerks
Vacuum cleanerInvention · Device that sucks up dirt from a surface (placed at Gloucester (where Hubert Cecil Booth was born))Invented or discovered by: Hubert Cecil Booth. Discovered or invented: 1901.https://en.wikipedia.org/wiki/Vacuum_cleaner
Vincent SchaeferAmerican chemist and meteorologist (placed at Schenectady)Cloud seeding, a form of weather modification, is the attempt to change the amount or type of precipitation that falls from clouds, by dispersing substances into the air that serve as cloud condensation or ice nuclei, which alter the microphysical processes within the cloud. The usual intent is to ihttps://en.wikipedia.org/wiki/Vincent_Schaefer
Walter CampAmerican football player and coach (1859–1925) (placed at New Britain)American football, known in the United States simply as football, is a spectator sport known for combining strategy with competitive physical play. The objective of the game is to score points by advancing the ball into the opposing team's end zone. The ball can be advanced by carrying it (a runninghttps://en.wikipedia.org/wiki/Walter_Camp
Walter Hunt (inventor)American mechanic and inventor (1796–1859) (placed at New York)Most modern sewing machines use the lockstitch technique of sewing invented by Walter Hunt, which consists of two threads, an upper and a lower. The upper thread runs from a spool kept on a spindle on top of or next to the machine, through a tension mechanism, a take-up arm, and finally through the https://en.wikipedia.org/wiki/Walter_Hunt_%28inventor%29
Whitcomb L. JudsonAmerican inventor (1843–1909) (placed at Chicago)The zipper is a popular device for temporarily joining two edges of fabric. Zippers are found on trousers, jeans, jackets, and luggage. Whitcomb L. Judson was an American mechanical engineer from Chicago who was the first to invent, conceive of the idea, and to construct a workable zipper. Using a hhttps://en.wikipedia.org/wiki/Whitcomb_L._Judson
ZipperInvention · Device for binding the edges of an opening of fabric or other flexible material (placed at St. Catharines)Invented or discovered by: Whitcomb L. Judson. Discovered or invented: 1893. Made in: St. Catharines.https://en.wikipedia.org/wiki/Zipper