Topic leaderboard
Internal-combustion piston engines
Ranked by the PatentIndex Score — a 1–99 percentile within F02B · public-visibility date · generated 2026
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest F02B patents became public in the last 2 years — the current frontier
- 199Axel O. Zur Loye24 patents · 1,938 citations
- 296Daniel R. Cohn87 patents · 3,125 citations
- 392Leslie Bromberg79 patents · 2,155 citations
- 488Thomas G. Leone97 patents · 1,588 citations
- 583Rudolf Tscherne9 patents · 226 citations
- 679David Cleary10 patents · 285 citations
- 775Rudolf Kusel7 patents · 133 citations
- 871Michael W. Walser10 patents · 276 citations
- 967Billy Brandenburg8 patents · 242 citations
- 1063Luigi P. Tozzi21 patents · 283 citations
- 1158Craig N. Hansen23 patents · 375 citations
- 1254Paul C. Cross19 patents · 289 citations
- 1350Michael A. Carlson10 patents · 212 citations
- 1446Edward Charles Mendler12 patents · 231 citations
- 1542Charlie Kim16 patents · 259 citations
- 1638Fabien G. Redon43 patents · 252 citations
- 1733Bruno Villeneuve39 patents · 245 citations
- 1829Matt Svrcek21 patents · 102 citations
- 1925Vianney Rabhi19 patents · 196 citations
- 2021Mark J. Sarder28 patents · 190 citations
- 2117Toshimitsu Tanaka11 patents · 173 citations
- 2213Hiroshi Nakagawa10 patents · 136 citations
- 238Yoshimoto Matsuda29 patents · 207 citations
- 244Adam Simpson19 patents · 89 citations
- 251Shannon Miller14 patents · 81 citations
Active· last 5 yrs
Sustained F02B output across the last 5 years
- 199Axel O. Zur Loye24 patents · 1,938 citations
- 296Daniel R. Cohn87 patents · 3,125 citations
- 392Leslie Bromberg79 patents · 2,155 citations
- 488John B. Heywood41 patents · 1,098 citations
- 583Michael M. Schechter26 patents · 1,594 citations
- 679Michiel J. Van Nieuwstadt59 patents · 1,574 citations
- 775Thomas G. Leone97 patents · 1,588 citations
- 871Tomonori Urushihara43 patents · 931 citations
- 967David A. Pierpont40 patents · 1,067 citations
- 1063Rudolf Tscherne9 patents · 226 citations
- 1158Gregory James Hampson25 patents · 713 citations
- 1254Ross Dykstra Pursifull145 patents · 1,653 citations
- 1350Shikui Kevin Chen18 patents · 439 citations
- 1446Yoshihiro Sukegawa29 patents · 621 citations
- 1542Mitsuo Hitomi53 patents · 1,771 citations
- 1638Junsou Sasaki21 patents · 686 citations
- 1733Salvatore C. Scuderi13 patents · 365 citations
- 1829Alexander Serkh15 patents · 512 citations
- 1925Michael H. Wahl23 patents · 351 citations
- 2021Hiroyuki Yamashita27 patents · 626 citations
- 2117Mamoru Yoshioka25 patents · 557 citations
- 2213Michael Howard Shelby41 patents · 412 citations
- 238Michael B. Riley10 patents · 348 citations
- 244John Eric Rollinger62 patents · 703 citations
- 251Jianwen James Yi40 patents · 468 citations
All-time canon
Career PatentIndex Score in F02B
- 199Larry Gold98 patents · 14,712 citations
- 296Craig Tuerk16 patents · 4,995 citations
- 392Alex J. Severinsky14 patents · 1,686 citations
- 488Theodore Louckes14 patents · 1,686 citations
- 583Axel O. Zur Loye24 patents · 1,938 citations
- 679James Warren Dieffenderfer7 patents · 1,750 citations
- 775David B. Rolfe8 patents · 1,637 citations
- 871Billy J. Knowles7 patents · 1,590 citations
- 967Michael C. Dapp6 patents · 1,541 citations
- 1063Richard Edward Nier6 patents · 1,541 citations
- 1158Vincent John Smoral6 patents · 1,541 citations
- 1254Bruce Eaton11 patents · 2,009 citations
- 1350Peter M. Kogge9 patents · 1,769 citations
- 1446John F. Wright12 patents · 1,736 citations
- 1542Clive A. Collins6 patents · 1,307 citations
- 1638Eric E. Retter5 patents · 1,258 citations
- 1733Robert Reist Richardson5 patents · 1,258 citations
- 1829Donald Michael Lesmeister5 patents · 1,164 citations
- 1925Thomas Norman Barker5 patents · 1,164 citations
- 2021Kirk Jensen12 patents · 1,983 citations
- 2117Greg Moore7 patents · 1,232 citations
- 2213Julie A. Wagner5 patents · 1,216 citations
- 238Nicholas Jerome Schoonover5 patents · 1,090 citations
- 244Paul Amba Wilkinson5 patents · 1,090 citations
- 251Lester L. Peters13 patents · 1,147 citations
Rising· last 2 yrs
The top-scoring F02B patents made public in the last 2 years
- 199US12203406B2✦ AISupercharged internal combustion engine2 cites · 202467% earned
- 296US12092063B2✦ AIPredictive model-based spark control3 cites · 202472% earned
- 392US12409434B1✦ AISystems and methods for sequential energization of heating elements in an electric catalys1 cites · 202556% earned
- 488US12241405B2Internal combustion engine and cylinder block2 cites · 202476% earned
- 583US11946679B1Exhaust gas heat recovery from cryo-compression engines with cogeneration of cryo-working 3 cites · 202480% earned
- 679US12104550B1Rotary engine with side housing having a side plate with a ceramic matrix composite core2 cites · 202476% earned
- 775US11867099B1Crankcase ventilation system architecture3 cites · 202480% earned
- 871US12043402B1System and method for performing an actuator range check for an intercooler flow control a3 cites · 202480% earned
- 967US12117052B2Decoupler with torque-limiting feature to protect components thereof4 cites · 202482% earned
- 1063US12098641B2Rotational engine with inner and outer rings2 cites · 202461% earned
- 1158US12110836B2Engine cylinder with liner2 cites · 202461% earned
- 1254US12123370B2Rotary engine shim design for floating side plates2 cites · 202476% earned
- 1350US11885259B1Ammonia-hydrogen blended fuel control system based on reactivity regulation2 cites · 202476% earned
- 1446US12006882B1Rotary engine with dual-fuel injectors2 cites · 202476% earned
- 1542US11905836B1Rotary engine with single dual-fuel injector2 cites · 202476% earned
- 1638US12044191B2Cylinder liner for internal combustion engine and method for installing the same2 cites · 202476% earned
- 1733US11920480B1Turbine for a charging device2 cites · 202476% earned
- 1829US11965516B1Compressor system with remote-mounted recirculation valve2 cites · 202476% earned
- 1925US12158091B2V-type engine, outboard motor, and watercraft3 cites · 202480% earned
- 2021US12003133B1Variable voltage charging system and method for a vehicle2 cites · 202461% earned
- 2117US12088140B2Dispatchable flexible electricity generation for reliable decarbonized grids using multipl1 cites · 202450% earned
- 2213US12253054B1Chemically resistant inserts and/or spacers for an intake manifold that enable flow of coo1 cites · 202556% earned
- 238US12180882B2Propulsion assembly for a motor vehicle1 cites · 202467% earned
- 244US12297738B1Rotary engine and cooling systems thereof1 cites · 202567% earned
- 251US12480453B2Ammonia-rich combustion coupled dual-mode prechamber ammonia-fueled engine control system1 cites · 202567% earned
Active· last 5 yrs
The top-scoring F02B patents of the last 5 years
- 199US11251650B1✦ AIElectrical system for mobile power generation device and mobile power generation device124 cites · 202293% earned
- 296US11060443B1✦ AISystems and methods for increasing oxygen levels in an active pre-chamber22 cites · 202190% earned
- 392US11598269B1✦ AIAir intake plenum for attenuating sound from a marine engine12 cites · 202382% earned
- 488US11149662B2Zero emission propulsion systems and generator sets using ammonia as fuel24 cites · 202185% earned
- 583US11156198B1Systems and methods for ignition coil multiplexing in a pre-chamber system18 cites · 202189% earned
- 679US11428186B2Fuel agnostic compression ignition engine13 cites · 202275% earned
- 775US11598276B1Methods and systems for multi-fuel engine13 cites · 202388% earned
- 871US11333068B1Side wall for rotary engine housing13 cites · 202288% earned
- 967US10947948B1Systems and methods for ignition coil multiplexing in a pre-chamber system15 cites · 202183% earned
- 1063US11085402B1Methods and systems for operating an adjustable pre-chamber15 cites · 202189% earned
- 1158US10927745B1Cooling apparatus configurations for marine engines having a supercharger17 cites · 202189% earned
- 1254US10981636B1Marine engines having a supercharger16 cites · 202189% earned
- 1350US10975762B1Marine engines having a supercharger and charge air coolers16 cites · 202189% earned
- 1446US11761376B1Side plate for rotary engine9 cites · 202387% earned
- 1542US11261770B1Catalyst light off using purge fuel and e-booster11 cites · 202288% earned
- 1638US11073116B1Cooling systems for marine engines having a supercharger15 cites · 202189% earned
- 1733US11187149B2Case-integrated turbomachine wheel containment14 cites · 202189% earned
- 1829US11085364B2Intercooler assembly12 cites · 202188% earned
- 1925US11078826B1Gaseous fuel engine and sparkless operating strategy therefor11 cites · 202188% earned
- 2021US11352996B1Method and system for starting an internal combustion engine9 cites · 202270% earned
- 2117US11635046B1Method and systems for active air fuel ratio control9 cites · 202387% earned
- 2213US11035334B1Engine ignition system and method using sparkplug dry firing to extend service life10 cites · 202187% earned
- 238US11248551B1Methods and systems for pre-chamber operation during catalyst heating8 cites · 202286% earned
- 244US11536213B2Engine system with electrified air system components for managing emissions of nitrogen ox8 cites · 202286% earned
- 251US11156148B1Active prechamber for use in an internal combustion engine8 cites · 202186% earned
All-time canon
The defining F02B patents of the whole record
- 199US5270163A✦ AIMethods for identifying nucleic acid ligands1,688 cites · 199396% earned
- 296US4106446A✦ AIInternal combustion engine with auxiliary combustion chamber1,424 cites · 197895% earned
- 392US4054108A✦ AIInternal combustion engine1,376 cites · 197795% earned
- 488US5475096ANucleic acid ligands1,226 cites · 199587% earned
- 583US5567588ASystematic evolution of ligands by exponential enrichment: Solution SELEX712 cites · 199695% earned
- 679US4665913AMethod for ophthalmological surgery677 cites · 198795% earned
- 775US5271967AMethod and apparatus for application of thermal spray coatings to engine blocks650 cites · 199395% earned
- 871US4570217AMan machine interface644 cites · 198695% earned
- 967US5602462AUninterruptible power system636 cites · 199795% earned
- 1063US4439409ACrystalline aluminosilicate PSH-3 and its process of preparation615 cites · 198495% earned
- 1158US4992605AProduction of hydrocarbons with a relatively high cetane rating593 cites · 199195% earned
- 1254US6874480B1Flow meter590 cites · 200595% earned
- 1350US5635352ASolution phase nucleic acid sandwich assays having reduced background noise586 cites · 199792% earned
- 1446US5580737AHigh-affinity nucleic acid ligands that discriminate between theophylline and caffeine540 cites · 199695% earned
- 1542US4329162ADiesel particulate trap539 cites · 198295% earned
- 1638US5227614ACore computer processor module, and peripheral shell module assembled to form a pocket siz525 cites · 199395% earned
- 1733US5637459ASystematic evolution of ligands by exponential enrichment: chimeric selex506 cites · 199792% earned
- 1829US5475856ADynamic multi-mode parallel processing array494 cites · 199595% earned
- 1925US9909492B2Opposed piston internal combustion engine with inviscid layer sealing465 cites · 201495% earned
- 2021US5705337ASystematic evolution of ligands by exponential enrichment: chemi-SELEX459 cites · 199892% earned
- 2117US4483474ACombustion gas-powered fastener driving tool430 cites · 198495% earned
- 2213US6554088B2Hybrid vehicles406 cites · 200180% earned
- 238US4902487ATreatment of diesel exhaust gases403 cites · 199095% earned
- 244US5595877AMethods of producing nucleic acid ligands402 cites · 199786% earned
- 251US4403722ACombustion gas powered fastener driving tool402 cites · 198395% earned
Rising· last 2 yrs
Assignees whose newest F02B patents became public in the last 2 years — the current frontier
- 199TOYOTA MOTOR CO LTD1,479 patents · 26,705 citations
- 296GEN ELECTRIC227 patents · 5,030 citations
- 392CUMMINS INC267 patents · 3,605 citations
- 488FORD GLOBAL TECH LLC1,441 patents · 13,438 citations
- 583CATERPILLAR INC785 patents · 17,138 citations
- 679LITENS AUTOMOTIVE INC69 patents · 1,782 citations
- 775NISSAN MOTOR885 patents · 19,654 citations
- 871YAMAHA MOTOR CO LTD980 patents · 18,997 citations
- 967BOSCH GMBH ROBERT722 patents · 13,147 citations
- 1063HONDA MOTOR CO LTD1,768 patents · 29,144 citations
- 1158MITSUBISHI MOTORS CORP209 patents · 5,698 citations
- 1254ISUZU MOTORS LTD212 patents · 4,969 citations
- 1350BRUNSWICK CORP403 patents · 7,915 citations
- 1446BORGWARNER INC348 patents · 2,131 citations
- 1542MAZDA MOTOR704 patents · 10,876 citations
- 1638MITSUBISHI HEAVY IND LTD166 patents · 1,948 citations
- 1733DEERE & CO141 patents · 2,198 citations
- 1829DENSO CORP203 patents · 2,341 citations
- 1925VOLKSWAGEN AG96 patents · 1,170 citations
- 2021COHN DANIEL R11 patents · 134 citations
- 2117KAWASAKI HEAVY IND LTD239 patents · 3,105 citations
- 2213PORSCHE AG183 patents · 2,485 citations
- 238POLARIS INC62 patents · 727 citations
- 244SCANIA CV AB39 patents · 511 citations
- 251BAYERISCHE MOTOREN WERKE AG128 patents · 1,046 citations
Active· last 5 yrs
Sustained F02B output across the last 5 years
- 199TOYOTA MOTOR CO LTD1,479 patents · 26,705 citations
- 296GEN ELECTRIC227 patents · 5,030 citations
- 392CUMMINS INC267 patents · 3,605 citations
- 488MASSACHUSETTS INST TECHNOLOGY60 patents · 2,214 citations
- 583FORD GLOBAL TECH LLC1,441 patents · 13,438 citations
- 679CATERPILLAR INC785 patents · 17,138 citations
- 775LITENS AUTOMOTIVE INC69 patents · 1,782 citations
- 871SOUTHWEST RES INST112 patents · 2,985 citations
- 967NISSAN MOTOR885 patents · 19,654 citations
- 1063HONEYWELL INT INC202 patents · 4,381 citations
- 1158YAMAHA MOTOR CO LTD980 patents · 18,997 citations
- 1254BOSCH GMBH ROBERT722 patents · 13,147 citations
- 1350HONDA MOTOR CO LTD1,768 patents · 29,144 citations
- 1446MITSUBISHI MOTORS CORP209 patents · 5,698 citations
- 1542ISUZU MOTORS LTD212 patents · 4,969 citations
- 1638MITSUBISHI ELECTRIC CORP196 patents · 3,489 citations
- 1733BRUNSWICK CORP403 patents · 7,915 citations
- 1829BORGWARNER INC348 patents · 2,131 citations
- 1925FIAT RICERCHE44 patents · 1,348 citations
- 2021MTU FRIEDRICHSHAFEN GMBH98 patents · 2,099 citations
- 2117KOMATSU MFG CO LTD83 patents · 2,081 citations
- 2213MAZDA MOTOR704 patents · 10,876 citations
- 238MITSUBISHI HEAVY IND LTD166 patents · 1,948 citations
- 244PARKER HANNIFIN CORP16 patents · 869 citations
- 251DEERE & CO141 patents · 2,198 citations
All-time canon
All-time PatentIndex Score in F02B
- 199UNIV RESEARCH CORP6 patents · 4,065 citations
- 296NEXSTAR PHARMACEUTICALS INC66 patents · 9,161 citations
- 392PAICE LLC8 patents · 1,016 citations
- 488IBM35 patents · 3,555 citations
- 583GEN MOTORS CORP505 patents · 18,113 citations
- 679CUMMINS ENGINE CO INC168 patents · 7,475 citations
- 775BAXTER INT13 patents · 2,116 citations
- 871TOYOTA MOTOR CO LTD1,479 patents · 26,705 citations
- 967GEN ELECTRIC227 patents · 5,030 citations
- 1063TURBODYNE SYS INC23 patents · 2,612 citations
- 1158TOYODA CHUO KENKYUSHO KK34 patents · 3,006 citations
- 1254CUMMINS INC267 patents · 3,605 citations
- 1350MASSACHUSETTS INST TECHNOLOGY60 patents · 2,214 citations
- 1446DETROIT DIESEL CORP86 patents · 3,385 citations
- 1542ENGELHARD CORP25 patents · 2,209 citations
- 1638FORD GLOBAL TECH LLC1,441 patents · 13,438 citations
- 1733FORD GLOBAL TECH INC169 patents · 6,996 citations
- 1829CATERPILLAR INC785 patents · 17,138 citations
- 1925GILEAD SCIENCES INC21 patents · 1,102 citations
- 2021DIGITAL EQUIPMENT CORP16 patents · 2,197 citations
- 2117FORD MOTOR CO240 patents · 9,440 citations
- 2213HITACHI LTD316 patents · 7,936 citations
- 238LITENS AUTOMOTIVE INC69 patents · 1,782 citations
- 244FUJI HEAVY IND LTD178 patents · 5,069 citations
- 251INTEGRATED ENVIRONMENTAL TECHN9 patents · 794 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth