Who invented scissors?
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It was not until the middle ages that the scissors started to look the way we know them today. Leonardo DaVinci, famed painter of the Mona Lisa and outstanding inventor, is most frequently credited with inventing the modern sicssor formed from two separate pieces of metal, attached at a central pivot point. \n\nHowever tools with a similar look and function, yet clearly a different tool, have been dated to 1500BC, long before DaVinci's birth in 1452. These first scissors were quite different than the ones we have today, and were formed from one piece of metal, bent and sharpened on both ends in order to form the scissor blades. This basic scissors concept is still found today in the sheep shearing industry as the classic sheering instrument. \n\nClassic scissors are made of standard carbon steel. The higher the carbon content, the harder the scissors and the harder the scissors are, the longer they will perform their cutting function. Modern manufacturing techniques also include stainless steel. This alloy is rustproof, nickel-free, and can be well hardened. Acme has recently included titanium in its manufacturing process providing increased cutting performance and longevity.
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He invented the sandwich...\n:)
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A courtier named Ts'ai-Lun, from Lei-yang in China, was the inventor of paper (not papyrus) circa 105 A.D. Tell your friend I'm sorry he/she lost the bet.
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The printing press is a mechanical device for printing multiple copies of a text on sheets of paper. It was first invented in China. It was reinvented in the West by a German goldsmith and eventual printer, Johann Gutenberg, in the 1450s. There are several local claims for the invention in other parts of Europe, including Laurens Janszoon Coster in the Netherlands and Panfilo Castaldi in Italy.
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It is impossible to say who invented the compound microscope. Dutch spectacle-makers Hans Janssen and his son Zacharias Janssen are often said to have invented the first compound microscope in 1590, but this was a declaration by Zacharias Janssen himself halfway through the 17th century. The date is certainly not likely, as it has been shown that Zacharias Janssen actually was born around 1590. Another favorite for the title of 'inventor of the microscope' was Galileo Galilei. He developed an occhiolino or compound microscope with a convex and a concave lens in 1609. Galilei´s microscope was celebrated in the ´Lynx academy´ founded by Federico Cesi in 1603. Francesco Stelluti´s drawing of three bees were part of pope Urban VIII´s seal, and count as the first microscopic figure published (see Stephen Jay Gould, The Lying stones of Marrakech, 2000). Christiaan Huygens, another Dutchman, developed a simple 2-lens ocular system in the late 1600's that was achromatically corrected and therefore a huge step forward in microscope development. The Huygens ocular is still being produced to this day, but suffers from a small field size, and the eye relief is uncomfortably close compared to modern widefield oculars.\n\nAnton van Leeuwenhoek (1632-1723) is generally credited with bringing the microscope to the attention of biologists, even though simple magnifying lenses were already being produced in the 1500's, and the magnifying principle of water-filled glass bowls had been described by the Romans (Seneca). Van Leeuwenhoek's home-made microscopes were actually very small simple instruments with a single very strong lens. They were awkard in use but enabled van Leeuwenhoek to see highly detailed images, mainly because a single lens does not suffer the lens faults that are doubled or even multiplied when using several lenses in combination as in a compound microscope. It actually took about 150 years of optical development before the compound microscope was able to provide the same quality image as van Leeuwenhoek's simple microscopes. So although he was certainly a great microscopist, van Leeuwenhoek is, contrary to widespread claims, certainly not the inventor of the microscope.
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Whitcomb L. Judson invented the zipper.\n\nWhitcomb L. Judson was a lover of gadgets and machines and the idea for his "clasp locker" came from when a friend had a stiff back from trying to fasten his shoes. Judson's clasp locker was used mostly on mailbags, tobacco pouches and shoes. However, his design, like most first inventions needed to be fine-tuned.
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Invented by Sylvester Poon in 1897, first known as arsewipes\nbut didn`t sell so changed name one year later.
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Alexander Fleming in 1928 invented Pencillin.  It was a chance discovery.  He was doing some experimenting with Staphylococcus bacteria. He accidently left his culture plate smeared with the bacteria over the weekend. when he came back he found the plate contaminated.  When he looked closely he noticed that the bacteria was destroyed where the plate was infected.  Later he found out the mold(which infected the plate) to be Pencillium Notatum.  The following sites has more information, please read
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It was Robert Hooke He was an English Scientist.\nHe firt saw cells in wood from a cork tree he was studying.
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Dissecting scissors are the scissors use to cut open a human body either during operations or during atospy.
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He is also called Carl Linne. He was a Swedish scientist and he invented the classification of animals and plants that is still in usage in the 18th century. This is what I remember right now but you can learn more about him if you look up his name in an encyclopaedia or on Wikipedia.
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#1) Garrett Morgan of the United States realized the need to control the flow of traffic.  A gifted inventor and reportedly the first African American to own an automobile in Cleveland, Ohio, he invented the electric automatic traffic light.\n\n#2) Dr. Charles Richard Drew (1904-1950) was an American medical doctor and surgeon who started the idea of a blood bank and a system for the long-term preservation of blood plasma (he found that plasma kept longer than whole blood). His ideas revolutionized the medical profession and have saved many, many lives.
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the same person who invented the wall-stretcher
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leg raises and scissors
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The edwards scissor hands
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He made inventions that changed the world.
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Bernard Lassimone, a French mathematician, applied for the first patent (french patent #2444) on pencil sharpeners, in 1828. In 1847, Therry des Estwaux invented the manual pencil sharpener.