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On June 10, 1896, Cralle applied for a patent on his invention. He was awarded patent 576,395 on 2 February 1897. [4] The patented "Ice Cream Mold and Disher," was an ice cream scoop with a built-in scraper to allow for one-handed operation. [5] [6] Alfred's functional design is reflected in modern ice cream scoops. [7]
1936: Erwin Wilhelm Müller invents the field emission microscope. 1938: James Hillier builds another TEM. 1951: Erwin Wilhelm Müller invents the field ion microscope and is the first to see atoms. 1953: Frits Zernike, professor of theoretical physics, receives the Nobel Prize in Physics for his invention of the phase-contrast microscope.
Most ice cream scoops are hemispherical-shaped and contain a mechanical device to force the ice cream out of the scoop. The ice cream scoop was invented by African-American Alfred L. Cralle who was issued U.S. patent #576,395 on February 2, 1897. [58] 1897 Charcoal briquette
Antonie van Leeuwenhoek (1632–1723). The field of microscopy (optical microscopy) dates back to at least the 17th-century.Earlier microscopes, single lens magnifying glasses with limited magnification, date at least as far back as the wide spread use of lenses in eyeglasses in the 13th century [2] but more advanced compound microscopes first appeared in Europe around 1620 [3] [4] The ...
Cralle is a surname. Notable people with the surname include: Notable people with the surname include: Alfred L. Cralle (1866–1919), African-American businessman and inventor
The experiments of Antoine Lavoisier (1743–1794), a French chemist regarded as the founder of modern chemistry, were among the first to be truly quantitative. Lavoisier showed that although matter changes its state in a chemical reaction , the quantity of matter is the same at the end as at the beginning of every chemical reaction.
1021 – The astronomer, physicist and mathematician Ibn al-Haytham combines observations, experiments and rational arguments in his Book of Optics. c. 1025 – The scholar al-Biruni develops experimental methods for mineralogy and mechanics, and conducts elaborate experiments related to astronomical phenomena.
Van Leeuwenhoek was the first to observe microscopic organisms, using simple single-lensed microscopes of his own design. [1] 1729–1799 Lazzaro Spallanzani: Italian Proved that bacteria did not arise due to spontaneous generation by developing a sealed, sterile broth medium. [2] [3] 1749–1823 Edward Jenner: English