What kitchen appliance did Albert Einstein secure patents for, but not develop commercially?
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The refrigerator was actually once a fairly dangerous appliance.\n\nEinstein was moved when he read an account of an entire family killed in their sleep by the poisonous coolant that leaked out of their fridge.\n\nSo Einstein and another scientist who changed the course of history — Leo Szilard — began designing refrigerators with fewer moving parts.
100130
His kids are following in his footsteps -- inventing new cooking devices.  You might e-mail them and ask.  Here is their company's website:\n\nhttp://www.smokaroma.com/default.asp
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Do your own search at the U.S. Patent and Trademark Office (USPTO)\nhttp://patft.uspto.gov/netahtml/search-adv.htm\n\nTry this search for starters:\nTTL/(saw OR trimmer)
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i think the most useful invention to mankind would be electricity. without electricy, none of our current "conveniences" would be useful. without electricity, we would have no lights, no heat, no indoor hot water, no refrigeraation for food...electricity started it all and I feel it was and is the most useful to mankind.
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I think mixers, washing machines, tvs...maybe remotes for the tvs in the late 50s.  Radios were still really popular, too.  And toaster ovens.
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Einstein didn't invent the bomb.  Fermi was the first to have a controlled nuclear fission on 12/2/42.  Einstein's energy equation theorized that a tremendous amt of energy would be released when converting mass into energy.\n\nThe US invested tremendous resources, men and material, in the development of a nuclear weapon, as stated above the project was secretly called the Manhattan Project under direction of Scientist Oppenheimer with military oversite by General Groves.  It took 856 days, from the time of the first controlled nuclear fission experiment to the 7/16/45 detonation of the first nuclear explosion at Trinity Test Site in New Mexico.
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THomas Edison invented the light bulb.
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Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor and businessman who developed many devices which greatly influenced life in the 20th century. Dubbed "The Wizard of Menlo Park" by a newspaper reporter, he was one of the first inventors to apply the principles of mass production to the process of invention, and can therefore be credited with the creation of the first industrial research laboratory. Some of the inventions credited to him were not completely original, but alterations of earlier patents (most famously the light bulb), or were actually the work of his numerous employees. Nevertheless, Edison is considered one of the most prolific inventors in history, holding 1,093 U.S. patents in his name, as well as many patents in the United Kingdom, France, and Germany.
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This site has a timeline of everyday inventions; it covers more than the fifty years you want, but it is fairly short and there seems to be some other useful information on the site.\n\nhttp://www.factmonster.com/ipka/A0768871.html
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I would suggest a trip to the library. Look for books on inventors. Also, meet the person sitting behind the desk that says, "reference". You are why they live.
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Thomas Edison invented MANY things in his life:\n\n1. Incandescent lamp (aka the light bulb)\n2. Invented the microphone inside of telephones\n3. The locomotive train was a biggie.
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Max Karl Ernst Ludwig Planck (April 23, 1858 – October 4, 1947) was one of the most important German physicists of the late 19th and early 20th century; he is considered to be the inventor of quantum theory.
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It was invented by J. A. Kammerdiner in 1940. Patent #2215044
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The Toaster Oven, of course!\n\nPicture this.... A Black and Decker Toaster Oven the size of Flash Gordon, with coils that can broil a lobster the size of RI, with anthropomorphic traits. \n\nThe handle becomes a claw that grips ol'flashy around the middle, the maw of the BnD opens up and tosses him in...\n\nFace it... Flash would be flashed, fizzled, crispified and juicy on the inside.\n\nThen BnD's buddy, Ol'Electric carver would come by and slice up Flashy and arrange a tray of snacks for the Cuisinart and Kitchen Aide crowd.
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the one who discovered/ invented it had the last name of fahrenheit.
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Check the US Patent and Trademark Office. They have a search function.
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John Leslie was a Scottish physicist who devised an experiment to demonstrate how black surfaces radiated heat much more than shiny surfaces. \n\nHis experimental apparatus was a cubical vessel filled with boiling water. One side of the cube was highly polished metal, one side was painted black, and the remaining two were dull metal (copper). \n\nHe used this to demonstrate that radiation was greatest from the black side and negligible from the polished side. \n\nThis apparatus is known as Leslie's cube.