Editing Timeline of historic inventions (section)

=== 1945-1950 ===
* '''1945:''' The atomic bomb is developed by the [[Manhattan Project]] and swiftly used in August 1945 in the [[atomic bombings of Hiroshima and Nagasaki]], effectively ending [[World War II]].
* '''1945:''' [[Percy Spencer]], while employed at [[Raytheon]], would patent a magnetron based [[microwave oven]].<ref>{{Cite web |title=Espacenet - Bibliographic data |url=https://worldwide.espacenet.com/publicationDetails/biblio?CC=US&NR=2495429&KC=&FT=E&locale=en_EP |access-date=28 February 2022 |website=worldwide.espacenet.com}}</ref>
* '''1945:''' [[Willard Libby]] began his work on [[radiocarbon dating]]. He published his paper in 1946,<ref name=Bowman_9>[[#Bowman|Bowman (1995)]], pp.&nbsp;9–15.</ref><ref>{{cite journal|last=Libby|first=W.F.|year=1946|title=Atmospheric helium three and radiocarbon from cosmic radiation|journal=Physical Review|volume=69|issue=11–12|pages=671–672|bibcode=1946PhRv...69..671L|doi=10.1103/PhysRev.69.671.2}}</ref> a second paper in ''[[Science (journal)|Science]]'' in 1947.<ref name=Bowman_9/><ref name=Anderson_1947>{{cite journal|last1=Anderson|first1=E.C.|last2=Libby|first2=W.F.|last3=Weinhouse|first3=S.|last4=Reid|first4=A.F.|last5=Kirshenbaum|first5=A.D.|last6=Grosse|first6=A.V.|year=1947|title=Radiocarbon from cosmic radiation|journal=Science|volume=105|issue=2765|pages=576–577|bibcode=1947Sci...105..576A|doi=10.1126/science.105.2735.576|pmid=17746224}}</ref> Libby and [[James R. Arnold|James Arnold]] succeeded with the radiocarbon dating theory after results were published in ''Science'' in December 1949.<ref name=libby49>{{cite journal|last1=Arnold|first1=J.R.|last2=Libby|first2=W.F.|year=1949|title=Age determinations by radiocarbon content: checks with samples of known age|url=http://hbar.phys.msu.ru/gorm/fomenko/libby.htm|journal=Science|volume=110|issue=2869|pages=678–680|bibcode=1949Sci...110..678A|doi=10.1126/science.110.2869.678|jstor=1677049|pmid=15407879}}</ref><ref name=Aitken_60>[[#Aitken1990|Aitken (1990)]], pp.&nbsp;60–61.</ref>
* '''1946:''' [[James Martin (engineer)|James Martin]] invents the [[ejector seat]], inspired by the death of his friend and test pilot Captain [[Valentine Baker (pilot)|Valentine Baker]] in an aeroplane crash in 1942.
* '''1947:''' [[Holography]] is invented by [[Dennis Gabor]].
* '''1947:''' Floyd Farris and J.B. Clark ([[Stanolind Oil and Gas Corporation]]) invents [[hydraulic fracturing]] technology.<ref name="Hubbarb">{{Citation | first = George E | last = King | url = http://www.kgs.ku.edu/PRS/Fracturing/Frac_Paper_SPE_152596.pdf | title = Hydraulic fracturing 101 | publisher = Society of Petroleum Engineers | id = Paper 152596 | year = 2012}}</ref>
* '''1947:''' The first [[transistor]], a bipolar [[point-contact transistor]], is invented by [[John Bardeen]] and [[Walter Brattain]] under the supervision of [[William Shockley]] at [[Bell Labs]].
* '''1948:''' The first [[atomic clock]] is developed at the [[National Bureau of Standards]].
* '''1948:''' [[Basic oxygen steelmaking]] is developed by [[Robert Durrer]]. The majority of steel manufactured in the world is produced using the basic oxygen furnace; in 2000, it accounted for 60% of global steel output.<ref name=S978>Smil, pp. 97-98.</ref>