Editing List of inventors (section)

===P===
* [[Arogyaswami Paulraj]] (born 1944), India/U.S. – [[MIMO]]
* [[Antonio Pacinotti]] (1841–1912), Italy – [[Dynamo#Pacinotti dynamo|Pacinotti dynamo]]
* [[Hilary Page]] (1904–1957), UK – Self-Locking Building Bricks, the predecessor of [[Lego]]
* [[Larry Page]] (born 1973), U.S. – with [[Sergey Brin]] invented [[Google Search|Google web search engine]]
* [[William Painter (inventor)|William Painter]] (1838–1906), UK/U.S. – [[Crown cork]], [[William Painter (inventor)|Bottle opener]]
* [[Salvatore Pais]] (born 1967), Romania/U.S. – [[electromagnetic field]] generator to deflect asteroids away from the Earth, an [[inertial mass]] reduction device, a [[room-temperature superconductor]], a [[gravitational wave]] generator, and a [[compact fusion reactor]]
* [[Alexey Pajitnov]] (born 1956), Russia/U.S. – [[Tetris]]
* [[Julio Palmaz]] (born 1945), Argentina – balloon-expandable, [[stent]]
* [[Helge Palmcrantz]] (1842–1880), Sweden – multi-barrel, lever-actuated, [[machine gun]]
* [[Daniel David Palmer]] (1845–1913), Canada – [[chiropractic]]
* [[Luigi Palmieri]] (1807–1896), Italy – [[seismometer]]
* [[Frank Pantridge]] (1916–2004), Ireland – [[Defibrillation#Portable units become available|Portable defibrillator]]
* [[Georgios Papanikolaou]] (1883–1962), Greece / U.S. – [[Papanicolaou stain]], [[Pap test]] = [[Pap smear]]
* [[Alice H. Parker]] (1895–1920), U.S. – central heating using natural gas [[Furnace (house heating)|furnace]]
* [[Philip M. Parker]] (born 1960), U.S. – computer automated book authoring
* [[Thomas Parker (inventor)|Thomas Parker]] (1843–1915), England – electric car
* [[Alexander Parkes]] (1831–1890), UK – [[celluloid]]
* [[Florence Parpart]] ({{c.}} 1856–?), U.S. – industrial sweeping machine, electrical refrigerator
* [[Forrest Parry]] (1921–2005), U.S. – [[Magnetic stripe card]]
* [[Charles Algernon Parsons]] (1854–1931), British – [[steam turbine]]
* [[Spede Pasanen]] (1930–2001), Finland – ski jumping sling, [[boat ski]]
* [[Blaise Pascal]] (1623–1662), France – [[Pascal's calculator]]
* [[Gustaf Erik Pasch]] (1788–1862), Sweden – safety [[match]]
* [[Dimitar Paskov]] (1914–1986), Bulgaria – [[Galantamine]]
* [[C. Kumar N. Patel]] (born 1938), India/U.S. – [[Carbon dioxide laser]]
* [[Les Paul]] (1915–2009), U.S. – [[multitrack recording]]
* [[Andreas Pavel]] (born 1945), Brazil – audio devices
* [[Ivan Pavlov]] (1849–1936), Russia, – [[classical conditioning]]
* [[Floyd Paxton]] (1918–1975), U.S. – [[Bread clip]]
* [[John Pemberton]] (1831–1888), U.S. – [[Coca-Cola]]
* [[Slavoljub Eduard Penkala]] (1871–1922), [[Croatia]] – [[mechanical pencil]]
* [[Ralph Peo]] (1897–1966), U.S. – early [[Automobile air conditioning]], [[shock absorber]]s
* [[William Henry Perkin]] (1838–1907), UK – first synthetic organic chemical dye [[Mauveine]]
* [[Henry Perky]] (1843–1906), U.S. – [[shredded wheat]]
* [[Alfred Perot]] (1863–1925), together with [[Charles Fabry]] (1867–1945), France – [[Fabry–Pérot interferometer]] (physics)
* [[Stephen Perry (inventor)|Stephen Perry]], UK (''fl.'' 19th century) – [[rubber band]]
* [[Aurel Persu]] (1890–1977), Romania – first aerodynamic car, aluminum body with wheels included under the body, 1922
* [[Vladimir Petlyakov]] (1891–1942), Russia – [[heavy bomber]]
* [[Julius Richard Petri]] (1852–1921), Germany – [[Petri dish]]
* [[Peter Petroff]] (1919–2004), [[Bulgaria]] – digital wrist watch, heart monitor, weather instruments
* [[Fritz Pfleumer]] (1881–1945), Germany – [[magnetic tape]]
* [[Auguste Piccard]] (1884–1962), Switzerland – [[Bathyscaphe]]
* [[Gregory Goodwin Pincus]] (1903–1967), together with [[Min Chueh Chang]] (1908–1991), U.S./China – [[Combined oral contraceptive pill]]
* [[Nikolay Ivanovich Pirogov]] (1810–1881), Russia – early use of [[diethyl ether|ether]] as [[anaesthetic]], first [[anaesthesia]] in a field operation, various kinds of surgical operations
* [[Fyodor Pirotsky]] (1845–1898), Russia – [[electric tram]]
* [[Arthur Pitney]] (1871–1933), U.S. – [[postage meter]]
* [[Hippolyte Pixii]] (1808–1835), France – [[Dynamo#Pixii's dynamo|Pixii dynamo]]
* [[Joseph Plateau]] (1801–1883), Belgium – [[phenakistiscope]] (stroboscope)
* [[Baltzar von Platen (inventor)|Baltzar von Platen]] (1898–1984), Sweden – [[gas absorption refrigerator]]
* [[James Leonard Plimpton]] (1828–1911), U.S. – [[quad skates|roller skates]]
* [[Ivan Plotnikov]] (1902–1995), Russia – [[kirza]] leather
* [[Roy Plunkett]] (1910–1994), U.S. – [[Teflon]]
* [[Petrache Poenaru]] (1799–1875), [[Romania]] – [[fountain pen]]
* [[Christopher Polhem]] (1661–1751), Sweden – [[Padlock]]
* [[Nikolai Nikolaevich Polikarpov|Nikolai Polikarpov]] (1892–1944), Russia – [[Polikarpov|Po]]-series aircraft, including [[Polikarpov Po-2]] ''Kukuruznik'' (world's [[List of most produced aircraft|most produced biplane]])
* [[Eugene Polley]] (1915–2012), U.S. – wireless [[remote control]] (with [[Robert Adler]])
* [[Ivan Polzunov]] (1728–1766), Russia – first two-cylinder [[steam engine]]
* [[Mikhail Pomortsev]] (1851–1916), Russia  – [[nephoscope]]
* [[Olivia Poole]] (1889–1975), U.S. – Jolly Jumper baby harness
* [[Alexander Stepanovich Popov|Alexander Popov]] (1859–1906), Russia – radio pioneer, created a [[radio receiver]] that worked as a [[lightning detector]]
* [[Nikolay Popov]] (1931–2008), Russia – first fully [[gas turbine]] main battle tank ([[T-80]])
* [[Josef Popper]]  (1838–1921), Austria – discovered the transmission of power by electricity.
* [[Aleksandr Porokhovschikov]] (1892–1941), Russia – [[Vezdekhod]] (the first prototype [[tank]], or [[tankette]], and the first [[continuous track|caterpillar]] [[amphibious ATV]])
* [[Ignazio Porro]] (1801–1875), Italy – [[Porro prism]], [[strip camera]]
* [[Valdemar Poulsen]] (1869–1942), Denmark – [[Wire recording|magnetic wire recorder]], [[arc converter]]
* [[Joseph Priestley]] (1733–1804), UK – [[soda water]]
* [[Robert Taylor Pritchett]] (1828–1907), UK – Pritchett bullet
* [[Alexander Procofieff de Seversky]] (1894–1974), Russia/U.S. – first [[gyroscope|gyroscopically]] stabilized bombsight, [[ionocraft]], also developed [[air-to-air refueling]]
* [[Alexander Prokhorov]] (1916–2002), Russia – co-inventor of [[laser]] and [[maser]]
* [[Petro Prokopovych]] (1775–1850), [[Russian Empire]] – early [[Frame (beehive)|beehive frame]], [[queen excluder]] and other [[beekeeping]] novelties
* [[Sergey Prokudin-Gorsky]] (1863–1944), Russia/France – early [[colour photography]] method based on three colour channels, also colour film slides and colour [[motion pictures]]
* [[Mark Publicover]] (born 1958), U.S. – first affordable [[trampoline safety net enclosure]]
* [[George Pullman]] (1831–1897), U.S. – Pullman [[sleeping car|sleep wagon]]
* [[Ivan Puluj]] (1845–1918), Russia/Ukraine – [[X-rays]]
* [[Michael I. Pupin]] (1858–1935), [[Serbia]] – [[pupinization]] (loading coils), tunable oscillator
* [[Tivadar Puskás]] (1844–1893), Hungary – [[telephone exchange]]