When varicap diod was invented? And who has created the first varicap diod?
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The veractor diode (varicap diode) was invented by Arthur Uhlir and A. Bakanowski at Bell Labs in 1955
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It was invented by a man named Earle Morris
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Something he invented.
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The theorem (that every real integer can be written as the sum of four squares) was first stated (or enunciated) by Diophatus, the "father of algebra", around 1,800 years ago.  It may have been solved by Pierre de Fermet in 1638, but the first known, published proof was that of Joseph Lagrange in 1770.
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Dr. Jeorge valvus in the year 1872, when they had to construct an irrigation system for a sugar can plantation and in the process this man invented the valve.\n\ngood luck.
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The base process, called electroplating, was invented by the chemist Luigi V. Brugnatelli in 1805. Electropolishing, which is also know was reverse electroplating, developed some time after.
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The first match was made by Robert Boyle around 1680, and scientists and inventors have been improving them ever since.\n\nCheck out the website I've attached.  I hope this helps.
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In 1756, British engineer, John Smeaton made the first modern concrete (hydraulic cement) by adding pebbles as a coarse aggregate and mixing powered brick into the cement. In 1824, English inventor, Joseph Aspdin invented Portland Cement, which has remained the dominant cement used in concrete production.\n\nhttp://inventors.about.com/library/inventors/blconcrete.htm
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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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Try the official zorb website.  They have locations around the world.\n\nps.  I zorbed in NZ and met the guys who invented it.  It's a lot of fun.
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The Dioptra was another surveying instrument that was utilized by Roman Surveyors.  It was used to measure horizontal and vertical angles and could also be used as a leveling instrument and for astronomical observations as well.  As with most instruments used by the surveyors of the Roman Empire, the Dioptra was not an original invention of the Romans, but was developed by the Greeks and implemented by the Romans.  There are very few remains of the Dioptra and the estimation of the replication of this instrument vary from reference to reference.  The best recollection of the description of what the Dioptra may have looked like and its uses comes from the records of Hero of Alexandria.  Hero, a Greek, described the use of the Dioptra, however many of the important details regarding the construction of the instrument were either lost or destroyed.  Since there has not been any concrete evidence to the contrary, it is believed that the Romans used the Dioptra in much the same way as the Greeks did and the design of the Roman Dioptra was parallel to that of the Greek origin.\n\nThe staff of the Dioptra may have been a three-legged instrument, similar to today's tripod or possibly a monopole with three points at the base to assist in keeping it vertical.  Either of these types of staffs were approximately the equivalent of 7-7 U.S. Survey Feet in height.  At the top of the staff, was a circular plate with a cylinder attached to it.  This plate and cylinder allowed for rotation.  At the top of the cylinder was another circular plate, approximately 30 inches in diameter.  This plate was made of wood and was divided and marked into 360 degrees.  Although the Dioptra was divided into degrees, it is believed that these measurements were mainly used for astronomical observations.  However, the Greeks and Romans did have the knowledge and ability to use trigonometry, so it is possible that they used the Dioptra for horizontal angle measurement as well.\n\nAnother instrument used for leveling that could be placed on the tripod or monopole instead of the Dioptra was the water level.  This instrument was a linear bar made of wood and was approximately the equivalent of 6-7 U.S. Survey Feet in length, 1-1/2 inches thick and 2 inches in width.  In the center of the instrument, a groove was cut.  A vertical metal tube would be placed in the groove and the ends of the tube would protrude upwards approximately 1-1/2 inches from each end of the wooden bar.  A flat bar placed over the metal tube would assist in keeping the tube firmly in place.  In each end piece of the tubing, a glass cylinder would be fitted.  This cylinder was approximately the same height as the metal tube.  The glass cylindrical tube would be filled with water.  At the base of each end piece, a revolving rod or screw would be placed.  These screws would be used to move the instrument up or down until the surveyor determined it to be level.\n\nAn alternative method of leveling implemented by Roman Surveyors was by using an instrument call a Chorobate.  Since this instrument was made primarily of wood, there are virtually no remains still in existence today.  However, the descriptions for the design of the Chorobate and its use have been recovered.  It is believed that the Chorobate was used mainly for leveling in aqueducts.  Because of its massive size and weight, it would not have been as practical and appropriate as the Dioptra in laying out roadways.\n\nThe Chorobate was approximately 20 Roman Feet in length and was made predominantly of wood.  The Chorobate was elevated from the ground by wooden supports approximately 1-2 Roman Feet in height.  At the base of the supports were wooden braces, which had vertical marks across the face.  Plumb lines were hung from the supports and when the plumb lines on each end of the Chorobate touched the respective vertical marks simultaneously, the instrument would be level.  In windy conditions, a different method for using the Chorob
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We invented the concept of pi before the Greeks. Using higher math, we were able to create a perfect circle in three dimensions. Scultping the columns only required a complex circular leveling device using water which we invented in the 8th dynasty.
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A Hungarian journalist named Laszlo Biro invented the first ballpoint pen in 1938. Biro had noticed that the type of ink used in newspaper printing dried quickly, leaving the paper dry and smudge-free. He decided to create a pen using the same type of ink. The thicker ink would not flow from a regular pen nib and Biro had to devise a new type of point. He did so by fitting his pen with a tiny ball bearing in its tip. As the pen moved along the paper, the ball rotated picking up ink from the ink cartridge and leaving it on the paper.
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It was invented by J. A. Kammerdiner in 1940. Patent #2215044
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Oliver Lodge\n\nPatented Invention: http://inventors.about.com/library/inventors/bl_spark_plugs.htm\n\nAlso Edmund Berger (but he didn't patent)
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i've been looking and can't find an answer...maybe this is just one of the things history hasn't kept up with...:)...well i found the inventor of the first rubber cushioned brush...lol...that was mason pearson...well i found this website, which gives some history of the cushion but still no inventor...well i give up...tired of looking..hope you find your answer :)
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Invented by Fabrizio Mordente (1532 - c. 1608) to measure the smallest fraction of a ..................\n\n(1564-1642) T Geometric and military compass of Galileo Galilei ...............................