Topic leaderboard
Positive-displacement engines driven by liquids
Ranked by the PatentIndex Score — a 1–99 percentile within F03C · public-visibility date · generated 2026
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest F03C patents became public in the last 2 years — the current frontier
- 199Peter Thomas Cariveau15 patents · 66 citations
- 296Robert Bohmer5 patents · 30 citations
- 392Jonathan A. Lynch4 patents · 9 citations
- 488Joel Stettenheim4 patents · 9 citations
- 583Oliver James Brambles4 patents · 9 citations
- 679Per Erik Kristoffer Edstrom4 patents · 9 citations
- 775Troy O. Mcbride4 patents · 9 citations
- 871Julien Engrand5 patents · 7 citations
- 967Roger Hayes3 patents · 4 citations
- 1063Peter Augustinus Johannes Achten4 patents · 7 citations
- 1158Norman Ian Mathers4 patents · 6 citations
- 1254Cheng-Hsi Miao3 patents · 5 citations
- 1350Tao Luo3 patents · 5 citations
- 1446Tianliang Lin3 patents · 5 citations
- 1542Tong Guo3 patents · 5 citations
- 1638Reinhardt Thoms3 patents · 3 citations
- 1733Chris Shrive2 patents · 7 citations
- 1829Herbert Dym2 patents · 3 citations
- 1925Jianping Liu1 patents · 3 citations
- 2021Xiaomin Huang1 patents · 3 citations
- 2117Fumin Que1 patents · 3 citations
- 2213Andrej Babusa3 patents · 0 citations
- 238Felix Hoffmann2 patents · 1 citations
- 244Sebastien Gonzalez2 patents · 1 citations
- 251Loic Bonnard4 patents · 0 citations
Active· last 5 yrs
Sustained F03C output across the last 5 years
- 199Clive Tucker7 patents · 82 citations
- 296Evan Moen7 patents · 82 citations
- 392Johannes Schneider7 patents · 82 citations
- 488Ross J. Wendell7 patents · 82 citations
- 583Sean C. Morton7 patents · 82 citations
- 679Zackary Martin Anderson7 patents · 82 citations
- 775Zachary John Jackowski7 patents · 82 citations
- 871Peter Thomas Cariveau15 patents · 66 citations
- 967Niall James Caldwell12 patents · 75 citations
- 1063Stéphane Vidal8 patents · 107 citations
- 1158Robert Bohmer5 patents · 30 citations
- 1254Thomas J. Langenfeld5 patents · 52 citations
- 1350Thomas Afshari4 patents · 15 citations
- 1446Douglas Kinsella3 patents · 13 citations
- 1542Dwayne Parenteau3 patents · 13 citations
- 1638Kevin Leroux3 patents · 13 citations
- 1733Troy Lorenson3 patents · 13 citations
- 1829Robert E. Low3 patents · 12 citations
- 1925Daniil Dumnov3 patents · 23 citations
- 2021Nathan W. Bonny7 patents · 7 citations
- 2117Jonathan A. Lynch4 patents · 9 citations
- 2213Joel Stettenheim4 patents · 9 citations
- 238Oliver James Brambles4 patents · 9 citations
- 244Per Erik Kristoffer Edstrom4 patents · 9 citations
- 251Troy O. Mcbride4 patents · 9 citations
All-time canon
Career PatentIndex Score in F03C
- 199Steven M. Wood6 patents · 381 citations
- 296Danielle A. Fong5 patents · 182 citations
- 392Edwin P. Berlin, Jr.5 patents · 182 citations
- 488Karl E. Stahlkopf5 patents · 182 citations
- 583Stephen E. Crane5 patents · 182 citations
- 679Bernard Allart17 patents · 287 citations
- 775Franz Forster13 patents · 239 citations
- 871Louis Bigo15 patents · 234 citations
- 967Robert Moshe Lisniansky6 patents · 158 citations
- 1063Marvin L. Bernstrom6 patents · 106 citations
- 1158Jean-Claude Lallier5 patents · 98 citations
- 1254Amirhossein Pourmousa Abkenar4 patents · 168 citations
- 1350Clive Tucker7 patents · 82 citations
- 1446Evan Moen7 patents · 82 citations
- 1542Johannes Schneider7 patents · 82 citations
- 1638Ross J. Wendell7 patents · 82 citations
- 1733Sean C. Morton7 patents · 82 citations
- 1829Zackary Martin Anderson7 patents · 82 citations
- 1925Zachary John Jackowski7 patents · 82 citations
- 2021Alain Noel9 patents · 96 citations
- 2117Louis Martin6 patents · 92 citations
- 2213Karl Eickmann20 patents · 143 citations
- 238Peter Thomas Cariveau15 patents · 66 citations
- 244Bo Vigholm6 patents · 41 citations
- 251Markku Palo6 patents · 41 citations
Rising· last 2 yrs
The top-scoring F03C patents made public in the last 2 years
- 199US12055124B1✦ AIFour-quadrant radial piston hydraulic device and working method thereof3 cites · 202480% earned
- 296US11952899B1✦ AIBidirectional rotary hydraulic motor and pump3 cites · 202467% earned
- 392US12297833B2✦ AIRubber compound with fiber reinforcement0 cites · 20240% earned
- 488US12228065B2Hydraulic motor system for liquid transport tank0 cites · 20240% earned
- 583US12404831B2Thermal energy storage system including a plurality of vessels each having hot and cold li0 cites · 20240% earned
- 679US12365454B2Tilt rotor control0 cites · 20240% earned
- 775US12264678B2Fuel pump driven by a variable displacement motor for aerial refueling operation0 cites · 20240% earned
- 871US12398709B2Neutral setting device of an adjustable hydraulic unit0 cites · 20240% earned
- 967US12523201B2Hydrostatic radial piston unit0 cites · 20240% earned
- 1063US12345107B2Reduction of equivalent circulating density in well operations0 cites · 20240% earned
- 1158US12196297B2Hydromechanical systems and devices0 cites · 20240% earned
- 1254US12428808B2Hydraulic device, hydraulic motor and construction machine0 cites · 20240% earned
- 1350US12553410B2Hydraulic device0 cites · 20250% earned
- 1446US12503993B2Method for self-compensation structure of cam-lobe hydraulic motor plate distribution syst0 cites · 20240% earned
- 1542US12366232B2Hydraulic device0 cites · 20240% earned
- 1638US12492637B2Hydrostatic shoe with face seal0 cites · 20250% earned
- 1733US12553501B2Hydrostatic rotating machine with radial pistons and with improved distribution0 cites · 20250% earned
- 1829US12516662B2Actuation system for a motor0 cites · 20240% earned
- 1925US12326088B2Variable displacement hydraulic motor0 cites · 20240% earned
- 2021US12492620B2Hydraulically actuated double-acting positive displacement pump system for producing fluid0 cites · 20240% earned
- 2117US12480402B2Centering the housing parts of an axial piston machine0 cites · 20250% earned
- 2213US12492687B2Insert and method for manufacturing fluid pump0 cites · 20250% earned
- 238US12372060B2Power generation system0 cites · 20250% earned
- 244US12215678B2Flushing circuit for a hydraulic machine0 cites · 20240% earned
- 251US12092070B1Adjustable distribution plate for an axial piston assembly0 cites · 20240% earned
Active· last 5 yrs
The top-scoring F03C patents of the last 5 years
- 199US12055124B1✦ AIFour-quadrant radial piston hydraulic device and working method thereof3 cites · 202480% earned
- 296US11578693B1✦ AIThermal energy storage system including a vessel having hot and cold liquid portions separ6 cites · 202374% earned
- 392US11885333B2✦ AIFiber-reinforced rubber compound useful in PDM stators4 cites · 202362% earned
- 488US11454003B2Apparatus with hydraulic machine controller6 cites · 202278% earned
- 583US11788382B2Flow-through pulsing assembly for use in downhole operations4 cites · 202167% earned
- 679US11952899B1Bidirectional rotary hydraulic motor and pump3 cites · 202467% earned
- 775US11802505B2Hydraulic motor system for liquid transport tank2 cites · 202358% earned
- 871US11519504B1Piston ring for floating piston in a thermal energy storage system3 cites · 202280% earned
- 967US11781537B2Radial piston hydraulic device distributed by pilot operated check valves2 cites · 202376% earned
- 1063US11421533B2Tapered stators in positive displacement motors remediating effects of rotor tilt2 cites · 202176% earned
- 1158US11767832B2Fluid pressure rotating machine2 cites · 202376% earned
- 1254US11208980B1Integrated system for optimal continuous extraction of potential energy derived from waves1 cites · 202167% earned
- 1350US11994094B2Hydraulic device configured as a starter motor1 cites · 202367% earned
- 1446US11220804B2Hydraulic pressurizing medium supply assembly for a mobile work machine, and method1 cites · 202167% earned
- 1542US11795926B2Motor-hydraulic machine unit for attachment to a hydraulic assembly1 cites · 202167% earned
- 1638US11603837B2Rotary fluid device1 cites · 202156% earned
- 1733US11946462B2Hydraulic axial piston unit and method for controlling of a hydraulic axial piston unit1 cites · 202167% earned
- 1829US11649821B2Power generating unit1 cites · 202167% earned
- 1925US12264656B2Integrated energy generating damper0 cites · 20230% earned
- 2021US11760911B2Heat transfer compositions0 cites · 20210% earned
- 2117US11118680B1Steerable transaxle0 cites · 20210% earned
- 2213US11009015B1Hydraulic motor0 cites · 20210% earned
- 238US12365454B2Tilt rotor control0 cites · 20240% earned
- 244US11846283B2System to pump fluid and control thereof0 cites · 20210% earned
- 251US12442398B2Cylinder on demand hydraulic device0 cites · 20230% earned
All-time canon
The defining F03C patents of the whole record
- 199US8436489B2✦ AICompressed air energy storage system utilizing two-phase flow to facilitate heat exchange125 cites · 201183% earned
- 296US5671905A✦ AIElectrochemical actuator and method of making same107 cites · 199793% earned
- 392US6183226B1✦ AIProgressive cavity motors using composite materials94 cites · 200193% earned
- 488US5611397AReverse Moineau motor and centrifugal pump assembly for producing fluids from a well93 cites · 199789% earned
- 583US5759019AProgressive cavity pumps using composite materials79 cites · 199893% earned
- 679US5899067AHydraulic engine powered by introduction and removal of heat from a working fluid79 cites · 199993% earned
- 775US5207060ATandem hydraulic motor77 cites · 199393% earned
- 871US4271725AHydraulic motor unit77 cites · 198193% earned
- 967US3964450ARotary cam internal combustion radial engine75 cites · 197693% earned
- 1063US4030857APaint pump for airless spray guns72 cites · 197793% earned
- 1158US7841432B2Hydro-electric hybrid drive system for motor vehicle71 cites · 200893% earned
- 1254US4047850AProportioning pump with pneumatic distributor70 cites · 197792% earned
- 1350US7191738B2Liquid piston internal combustion power system70 cites · 200592% earned
- 1446US6241494B1Non-elastomeric stator and downhole drilling motors incorporating same68 cites · 200192% earned
- 1542US3937599APumping system using solar energy64 cites · 197692% earned
- 1638US4006783AHydraulic operated rock drilling apparatus63 cites · 197792% earned
- 1733US6357558B1Bearing device for supporting a wheel and equipped with braking means61 cites · 200292% earned
- 1829US5794442AAdaptive fluid motor control60 cites · 199892% earned
- 1925US4637552AWater jet aeration for sanitary fittings and the like58 cites · 198792% earned
- 2021US5491977AEngine using compressed air55 cites · 199692% earned
- 2117US5616019ARolling piston type expansion machine54 cites · 199792% earned
- 2213US7089745B2System for vaporization of liquid fuels for combustion and method of use52 cites · 200483% earned
- 238US4686829ARotary hydrostatic radial piston machines52 cites · 198792% earned
- 244US6905319B2Stator for down hole drilling motor52 cites · 200392% earned
- 251US4659294AHydrualic pressure amplifier52 cites · 198792% earned
Rising· last 2 yrs
Assignees whose newest F03C patents became public in the last 2 years — the current frontier
- 199POCLAIN HYDRAULICS IND41 patents · 289 citations
- 295CATERPILLAR INC13 patents · 101 citations
- 391BOSCH GMBH ROBERT54 patents · 121 citations
- 486ABACO DRILLING TECH LLC5 patents · 19 citations
- 582NORWICH TECH INC4 patents · 9 citations
- 677DANFOSS POWER SOLUTIONS GMBH & CO OHG9 patents · 5 citations
- 773HAYES ROGER3 patents · 4 citations
- 868INNAS BV4 patents · 7 citations
- 964MATHERS HYDRAULICS TECH PTY LTD4 patents · 6 citations
- 1059UNIV HUAQIAO3 patents · 5 citations
- 1155DYM HERBERT3 patents · 3 citations
- 1250WEATHERFORD TECH HOLDINGS LLC3 patents · 2 citations
- 1345NABTESCO CORP3 patents · 1 citations
- 1441DANA MOTION SYS ITALIA SRL5 patents · 0 citations
- 1536FEDERAL IND INC2 patents · 0 citations
- 1632GOODRICH ACTUATION SYSTEMS LTD2 patents · 0 citations
- 1727GOODRICH CORP3 patents · 0 citations
- 1823DANFOSS POWER SOLUTIONS JIANGSU CO LTD2 patents · 0 citations
- 1918BUCHER HYDRAULICS AG1 patents · 0 citations
- 2014OKUMURA HISAKAZU1 patents · 0 citations
- 219PMC PUMPS INC1 patents · 0 citations
- 225TUTURESKI SIMON1 patents · 0 citations
- 231UNIV ZHEJIANG1 patents · 0 citations
Active· last 5 yrs
Sustained F03C output across the last 5 years
- 199POCLAIN HYDRAULICS IND41 patents · 289 citations
- 296CATERPILLAR INC13 patents · 101 citations
- 392BOSCH GMBH ROBERT54 patents · 121 citations
- 488DANFOSS AS15 patents · 79 citations
- 583KOMATSU MFG CO LTD17 patents · 63 citations
- 679PARKER HANNIFIN CORP14 patents · 65 citations
- 775ARTEMIS INTELLIGENT POWER LTD13 patents · 56 citations
- 871ABACO DRILLING TECH LLC5 patents · 19 citations
- 967HYDRO GEAR LP7 patents · 18 citations
- 1063PROJECT PHOENIX LLC4 patents · 15 citations
- 1158CLEARMOTION INC4 patents · 6 citations
- 1254DEERE & CO5 patents · 17 citations
- 1350IMPULSE DOWNHOLE SOLUTIONS LTD3 patents · 13 citations
- 1446EATON INTELLIGENT POWER LTD8 patents · 10 citations
- 1542MEXICHEM AMANCO HOLDING SA3 patents · 12 citations
- 1638NORWICH TECH INC4 patents · 9 citations
- 1733HYDAC DRIVE CENTER GMBH5 patents · 3 citations
- 1829DANFOSS POWER SOLUTIONS GMBH & CO OHG9 patents · 5 citations
- 1925HAYES ROGER3 patents · 4 citations
- 2021INNAS BV4 patents · 7 citations
- 2117MATHERS HYDRAULICS TECH PTY LTD4 patents · 6 citations
- 2213UNIV HUAQIAO3 patents · 5 citations
- 238DYM HERBERT3 patents · 3 citations
- 244DANFOSS POWER SOLUTIONS INC5 patents · 2 citations
- 251LEE DONG WON3 patents · 2 citations
All-time canon
All-time PatentIndex Score in F03C
- 199POCLAIN HYDRAULICS IND41 patents · 289 citations
- 296POCLAIN HYDRAULICS SA25 patents · 399 citations
- 392LINDE AG15 patents · 261 citations
- 488EATON CORP14 patents · 183 citations
- 583EICKMANN KARL20 patents · 143 citations
- 679SUNDSTRAND CORP6 patents · 86 citations
- 775CATERPILLAR INC13 patents · 101 citations
- 871BOSCH GMBH ROBERT54 patents · 121 citations
- 967DANFOSS AS15 patents · 79 citations
- 1063HITACHI CONSTRUCTION MACHINERY6 patents · 58 citations
- 1158WOOD STEVEN M3 patents · 223 citations
- 1254KOMATSU MFG CO LTD17 patents · 63 citations
- 1350REXROTH MANNESMANN GMBH4 patents · 86 citations
- 1446PARKER HANNIFIN CORP14 patents · 65 citations
- 1542ARTEMIS INTELLIGENT POWER LTD13 patents · 56 citations
- 1638SAUER INC4 patents · 97 citations
- 1733SAUER DANFOSS INC6 patents · 63 citations
- 1829VIGHOLM BO5 patents · 31 citations
- 1925LINDEN ALIMAK AB3 patents · 133 citations
- 2021RIVA CALZONI SPA4 patents · 61 citations
- 2117PARTEK AB4 patents · 52 citations
- 2213HYDRO GEAR LTD PARTNERSHIP5 patents · 52 citations
- 238ABACO DRILLING TECH LLC5 patents · 19 citations
- 244LIGHTSAIL ENERGY INC3 patents · 41 citations
- 251KAWASAKI HEAVY IND LTD6 patents · 29 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth