Editing List of inventors (section)

===R===
* [[Jacob Rabinow]] (1910–1999), U.S. – [[Magnetic particle clutch]], various [[Phonograph]]-related patents
* [[John Goffe Rand]] (1801–1873), U.S. – [[Tube (container)]]
* [[Robert Ransome]] (1753–1830), England – improvement to the plough
* [[Muhammad ibn Zakarīya Rāzi]] (Rhazes) (865–965), [[History of Iran|Persia]]/[[Iran]] – [[distillation]] and [[Extraction (chemistry)|extraction]] methods,[[hydrochloric acid]], [[soap]] [[kerosene]], [[kerosene lamp]], [[chemotherapy]], [[sodium hydroxide]]
* [[Alec Reeves]] (1902–1971), UK – [[Pulse-code modulation]]
* [[Karl von Reichenbach]] (1788–1869), Germany – [[Kerosene|paraffin]], [[creosote|creosote oil]], [[phenol]]
* [[Tadeus Reichstein]] (1897–1996), Poland/Switzerland – [[Reichstein process]] (industrial vitamin C synthesis)
* [[Ira Remsen]] (1846–1927), U.S. – [[saccharin]]
* [[Ralf Reski]] (born 1958), Germany – [[Moss bioreactor]] 1998
* [[Josef Ressel]] (1793–1857), [[Czechoslovakia]] – ship [[propeller]]
* [[William Reynolds (industrialist)|William Reynolds]] (1758–1803), England – [[canal inclined plane]]
* [[Ri Sung-gi]] (1905–1996), North Korea – [[Vinylon]]
* [[Charles Francis Richter]] (1900–1985), U.S. – [[Richter magnitude scale]]
* [[Adolph Rickenbacker]] (1886–1976), Switzerland – [[Electric guitar]]
* [[Hyman George Rickover]] (1900–1986), U.S. – [[Nuclear submarine]]
* [[Niklaus Riggenbach]] (1817–1899), Switzerland – [[Rack railway#Riggenbach|Riggenbach rack railway system]], [[Counter-pressure brake]]
* [[Dennis Ritchie]] (1941–2011), U.S. – [[C (programming language)]]
* [[Gilles de Roberval]] (1602–1675), France – [[Roberval balance]]
* [[John Roebuck]] (1718–1794) UK – [[lead chamber process]] for sulfuric acid synthesis
* [[Francis Rogallo]] (1912–2009), U.S. – [[Rogallo wing]]
* [[Heinrich Rohrer]] (1933–2013), together with [[Gerd Binnig]] (1947–), Switzerland/Germany – [[Scanning tunneling microscope]]
* [[Peter I of Russia|Peter I the Great]] (Pyotr Alexeyevich Romanov), [[Tsar]] and [[Emperor of Russia]] (1672–1725), Russia – [[decimal currency]], [[yacht club]], [[sounding line]] with separating [[plumb-bob|plummet]] ([[Deep-sea exploration#Oceanographic Instrumentation|sounding weight probe]])
* [[Wilhelm Conrad Röntgen]] (1845–1923), Germany – the [[X-ray machine]]
* [[Ida Rosenthal]] (1886–1973), [[Belarus]]/Russia/U.S. – [[Bra]] ([[Maidenform]]), the standard of [[Bra sizing|cup size]]s, [[nursing bra]], full-figured bra, the first seamed uplift bra (all with her husband William)
* [[Sidney Rosenthal]] (1907–1979), U.S. – [[Magic Marker]]
* [[Eugene Roshal]] (born 1972), Russia – [[FAR Manager|FAR]] file manager, [[RAR (file format)|RAR]] [[file format]], [[WinRAR]] [[file archiver]]
* [[Boris Rosing]] (1869–1933), Russia – [[CRT television]] (first television system using [[cathode-ray tube]] on the receiving side)
* [[Guido van Rossum]] (born 1956), The Netherlands – [[Python (programming language)]]
* [[M. A. Rothman|Michael Rothman]], U.S. – [[UEFI]]
* [[Subrata Roy (scientist)]] (born 1962), India, U.S. – [[Wingless Electromagnetic Air Vehicle]], [[Serpentine geometry plasma actuator]], [[Wingless Electromagnetic Air Vehicle#Novel Technologies|micro-scale actuators]]
* [[Jean-François Pilâtre de Rozier]] (1754–1785), France – [[Rozière balloon]]
* [[Ernő Rubik]] (born 1944), Hungary – [[Rubik's Cube]], [[Rubik's Magic]] and [[Rubik's Clock]]
* [[Kay LeRoy Ruggles]] (1932–2012), U.S. – inventor and designer known for UMBO shelving and furniture
* [[Ernst Ruska]] (1906–1988), Germany – [[electron microscope]]
* [[William Chester Ruth]] (1882–1971), U.S. – combination baler feeder, self-lifting farm elevator
* [[François van Rysselberghe]] (1846–1893), Belgium – Universal meteorograph, [[Condenser telephone]]
* [[Stockton Rush]] (1962–2023), U.S. – co-founder and chief executive officer of [[OceanGate]]