Topic leaderboard
Cylinders, pistons or casings for engines
Ranked by the PatentIndex Score — a 1–99 percentile within F02F · public-visibility date · generated 2026
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest F02F patents became public in the last 2 years — the current frontier
- 199Hisashi Ozeki8 patents · 91 citations
- 296Chad Koci10 patents · 81 citations
- 392Jonathan W. Anders17 patents · 65 citations
- 488Andrew P. Perr9 patents · 63 citations
- 583Michael Weinenger25 patents · 30 citations
- 679Jonathan R. Chittenden12 patents · 43 citations
- 775Brian D. Kaminski6 patents · 63 citations
- 871Norbert Schneider13 patents · 27 citations
- 967Daniel P. Hoffman9 patents · 28 citations
- 1063Bobby John12 patents · 31 citations
- 1158Jan Eismark9 patents · 21 citations
- 1254David M. Barnes11 patents · 30 citations
- 1350Aaron Ness9 patents · 20 citations
- 1446Christopher L. Batta9 patents · 17 citations
- 1542Kevin R. Anderson5 patents · 46 citations
- 1638Patrick Henry Baer5 patents · 29 citations
- 1733Qigui Wang19 patents · 10 citations
- 1829Wolfram Cromme5 patents · 17 citations
- 1925Terutaka Yasuda5 patents · 16 citations
- 2021Naotoshi Furukawa4 patents · 6 citations
- 2117Yu Matsui4 patents · 6 citations
- 2213Hiroki Oso7 patents · 9 citations
- 238Viorel Petrariu6 patents · 6 citations
- 244Frank M. Graczyk3 patents · 27 citations
- 251Tomihisa Tsuchiya3 patents · 12 citations
Active· last 5 yrs
Sustained F02F output across the last 5 years
- 199Michael H. Wahl16 patents · 307 citations
- 296Andrew A. Pouring10 patents · 318 citations
- 392Thomas G. Leone11 patents · 272 citations
- 488Shinichi Murata18 patents · 221 citations
- 583Paul M. Najt15 patents · 222 citations
- 679Rainer Scharp65 patents · 389 citations
- 775Takashi Matsutani10 patents · 135 citations
- 871Kai Sebastian Kuhlbach20 patents · 148 citations
- 967Terrance M. Cleary10 patents · 135 citations
- 1063Raymond J. Donahue10 patents · 126 citations
- 1158Hisashi Ozeki8 patents · 91 citations
- 1254Noriyuki Ota7 patents · 116 citations
- 1350Ulrich Bischofberger25 patents · 105 citations
- 1446Kent H. Clark6 patents · 102 citations
- 1542Jan Mehring14 patents · 83 citations
- 1638Takashi Sato12 patents · 90 citations
- 1733Jody Michael Slike21 patents · 99 citations
- 1829Kenth I. Svensson16 patents · 100 citations
- 1925Chad Koci10 patents · 81 citations
- 2021Jonathan W. Anders17 patents · 65 citations
- 2117Bernd Steiner14 patents · 68 citations
- 2213Gregg D. Langenfeld4 patents · 72 citations
- 238Warran Boyd Lineton22 patents · 70 citations
- 244Masanori Noguchi4 patents · 160 citations
- 251Satoshi Yamada7 patents · 44 citations
All-time canon
Career PatentIndex Score in F02F
- 199Jerome H. Lemelson12 patents · 1,306 citations
- 296Timothy R. Pryor11 patents · 888 citations
- 392Carmelo J. Scuderi6 patents · 468 citations
- 488Toshiharu Nogi33 patents · 907 citations
- 583Takuya Shiraishi30 patents · 831 citations
- 679Minoru Ohsuga20 patents · 541 citations
- 775Alois Wolfsgruber8 patents · 229 citations
- 871Rudolf Tscherne7 patents · 203 citations
- 967Norbert Korenjak9 patents · 300 citations
- 1063Yoko Nakayama20 patents · 522 citations
- 1158James U. Lemke16 patents · 320 citations
- 1254Shizuo Sasaki14 patents · 587 citations
- 1350Noboru Tokuyasu14 patents · 442 citations
- 1446Mamoru Fujieda14 patents · 388 citations
- 1542Takao Nishida16 patents · 371 citations
- 1638Yasutake Ryu10 patents · 311 citations
- 1733Souhei Honda7 patents · 216 citations
- 1829Takanori Tsugekawa5 patents · 212 citations
- 1925David Schroeder5 patents · 231 citations
- 2021Stephen R. Kurek5 patents · 231 citations
- 2117Michael H. Wahl16 patents · 307 citations
- 2213Yoshishige Oyama6 patents · 205 citations
- 238Hans Strom8 patents · 216 citations
- 244Mitsuo Hitomi18 patents · 674 citations
- 251Diana Brehob6 patents · 311 citations
Rising· last 2 yrs
The top-scoring F02F patents made public in the last 2 years
- 199US12241405B2✦ AIInternal combustion engine and cylinder block2 cites · 202476% earned
- 296US12104550B1✦ AIRotary engine with side housing having a side plate with a ceramic matrix composite core2 cites · 202476% earned
- 392US12110836B2✦ AIEngine cylinder with liner2 cites · 202461% earned
- 488US12123370B2Rotary engine shim design for floating side plates2 cites · 202476% earned
- 583US12044191B2Cylinder liner for internal combustion engine and method for installing the same2 cites · 202476% earned
- 679US11965445B1Fastening structure and method for designing fastening structure2 cites · 202476% earned
- 775US12281626B1Piston body for an engine having surface features for interacting with boundary layer1 cites · 202567% earned
- 871US12173662B1Valve cover assembly for internal combustion engine1 cites · 202467% earned
- 967US12286940B2Parent bore cylinder block of an opposed-piston engine0 cites · 20240% earned
- 1063US12276217B2Engine device0 cites · 20240% earned
- 1158US12221940B2Engine device0 cites · 20240% earned
- 1254US12180867B2Engine system0 cites · 20240% earned
- 1350US12429010B2Air-cooled, four-stroke aviation engine0 cites · 20240% earned
- 1446US12305591B2Reciprocating-piston assembly, internal combustion engine, and related methods0 cites · 20240% earned
- 1542US12264636B2Low compression natural gas engine piston bowl for improved combustion stability0 cites · 20240% earned
- 1638US12228057B2Pulse turbo charging exhaust system0 cites · 20240% earned
- 1733US12253046B2Internal combustion engine for gaseous fuel0 cites · 20240% earned
- 1829US12292013B2Piston assembly with gapless oil control ring0 cites · 20240% earned
- 1925US12331696B2Cylinder liner, apparatus for extracting a cylinder liner and method for extracting a cyli0 cites · 20240% earned
- 2021US12276235B2Internal combustion engine with reduced oil maintenance0 cites · 20240% earned
- 2117US12480457B2Internal combustion engine0 cites · 20250% earned
- 2213US12372013B2Internal combustion engine with a high-pressure fuel pump0 cites · 20240% earned
- 238US12253047B2Internal combustion engine with means for condensation fluid removal0 cites · 20240% earned
- 244US12326123B2Cover member0 cites · 20250% earned
- 251US11905911B2Internal combustion engine0 cites · 20240% earned
Active· last 5 yrs
The top-scoring F02F patents of the last 5 years
- 199US10927745B1✦ AICooling apparatus configurations for marine engines having a supercharger17 cites · 202189% earned
- 296US11149680B1✦ AIWeak tumble flow fast combustion system and gas engine8 cites · 202186% earned
- 392US10876462B1✦ AICoolant jacket insert10 cites · 202187% earned
- 488US10989129B1Systems and methods for adjusting fueling in a cylinder with a pre-chamber9 cites · 202181% earned
- 583US11566580B1Cylinder head assembly having fuel injector sleeve for mid-deck reacting of injector clamp6 cites · 202374% earned
- 679US12241405B2Internal combustion engine and cylinder block2 cites · 202476% earned
- 775US12104550B1Rotary engine with side housing having a side plate with a ceramic matrix composite core2 cites · 202476% earned
- 871US11300018B2Hollow exhaust poppet valve6 cites · 202185% earned
- 967US11221077B2Flow control valve apparatus5 cites · 202184% earned
- 1063US11098676B1Radial lip piston profile for easy forgeability5 cites · 202184% earned
- 1158US11391198B2Split cycle engine4 cites · 202170% earned
- 1254US11359537B1Spark ignition engine, pre-chamber, and method for cooling a pre-chamber4 cites · 202282% earned
- 1350US11519359B1Low compression natural gas engine piston bowl for improved combustion stability3 cites · 202280% earned
- 1446US11732634B1Engine3 cites · 202380% earned
- 1542US12110836B2Engine cylinder with liner2 cites · 202461% earned
- 1638US11002219B1Spark plug gasket crush limiter4 cites · 202182% earned
- 1733US11002216B1Cylinder liner and cylinder liner-piston assembly for abnormal combustion protection in an4 cites · 202182% earned
- 1829US12000357B2Reciprocating heat engine with hot cylinder head and cold cylinder2 cites · 202376% earned
- 1925US12123370B2Rotary engine shim design for floating side plates2 cites · 202476% earned
- 2021US11092063B1Systems and methods for engine pre-chamber coolant flow4 cites · 202182% earned
- 2117US11035333B1Duct assembly for fuel injection systems in engines4 cites · 202182% earned
- 2213US12044191B2Cylinder liner for internal combustion engine and method for installing the same2 cites · 202476% earned
- 238US11965445B1Fastening structure and method for designing fastening structure2 cites · 202476% earned
- 244US11359568B1Methods and systems for fuel injection control3 cites · 202280% earned
- 251US11346317B1Ignition system for dual mode ignition and engine having the same3 cites · 202280% earned
All-time canon
The defining F02F patents of the whole record
- 199US5472463A✦ AIPressure side integrated air filter and filtering networks for engines296 cites · 199594% earned
- 296US5506682A✦ AIRobot vision using targets251 cites · 199689% earned
- 392US5506863A✦ AIMethod and apparatus for operating with a hopping control channel in a communication syste230 cites · 199694% earned
- 488US4960643AComposite synthetic materials218 cites · 199091% earned
- 583US5191867AHydraulically-actuated electronically-controlled unit injector fuel system having variable217 cites · 199394% earned
- 679US4805571AInternal combustion engine214 cites · 198994% earned
- 775US5416056AProduction of highly microporous activated carbon products204 cites · 199594% earned
- 871US4627406AOil separator for recycled blow-by gas200 cites · 198694% earned
- 967US5513603ASeal and fastener isolator system for a valve cover193 cites · 199694% earned
- 1063US4203393APlasma jet ignition engine and method192 cites · 198094% earned
- 1158US5080056AThermally sprayed aluminum-bronze coatings on aluminum engine bores192 cites · 199294% earned
- 1254US5112507APolymeric dispersants having alternating polyalkylene and succinic groups180 cites · 199294% earned
- 1350US5332348AFastening devices178 cites · 199490% earned
- 1446US6293246B1Spark-assist type self-ignition engine176 cites · 200194% earned
- 1542US6279550B1Internal combustion engine171 cites · 200194% earned
- 1638US5343699AMethod and apparatus for improved operation of internal combustion engines169 cites · 199494% earned
- 1733US5710092AHighly microporous carbon169 cites · 199894% earned
- 1829US4672813AExternal combustion slidable vane motor with air cushions163 cites · 198794% earned
- 1925US5965483AHighly microporous carbons and process of manufacture161 cites · 199994% earned
- 2021US6866092B1Two-phase heat-transfer systems159 cites · 200594% earned
- 2117US5682854AVariable compression ratio engine151 cites · 199794% earned
- 2213US6543225B2Split four stroke cycle internal combustion engine147 cites · 200384% earned
- 238US5438873AFiberoptic sensor using tapered and bundled fibers146 cites · 199594% earned
- 244US5871391AApparatus for determining dimensions144 cites · 199993% earned
- 251US4974498AInternal combustion engines and engine components142 cites · 199090% earned
Rising· last 2 yrs
Assignees whose newest F02F patents became public in the last 2 years — the current frontier
- 199CATERPILLAR INC241 patents · 3,219 citations
- 296HONDA MOTOR CO LTD595 patents · 9,426 citations
- 392TOYOTA MOTOR CO LTD424 patents · 5,844 citations
- 488NISSAN MOTOR268 patents · 4,750 citations
- 583MAZDA MOTOR231 patents · 3,388 citations
- 679ACHATES POWER INC48 patents · 301 citations
- 775AVL LIST GMBH60 patents · 728 citations
- 871ISUZU MOTORS LTD61 patents · 989 citations
- 967BRUNSWICK CORP52 patents · 731 citations
- 1063MITSUBISHI HEAVY IND LTD20 patents · 231 citations
- 1158BOSCH GMBH ROBERT37 patents · 485 citations
- 1254BRP ROTAX GMBH & CO KG12 patents · 177 citations
- 1350HYUNDAI MOTOR CO LTD137 patents · 505 citations
- 1446VOLKSWAGEN AG25 patents · 246 citations
- 1542MAHLE INT GMBH142 patents · 342 citations
- 1638CUMMINS INC72 patents · 116 citations
- 1733KS KOLBENSCHMIDT GMBH30 patents · 102 citations
- 1829KUBOTA KK32 patents · 86 citations
- 1925CATERPILLAR ENERGY SOLUTIONS GMBH9 patents · 35 citations
- 2021DELTAHAWK ENGINES INC9 patents · 23 citations
- 2117SUZUKI MOTOR CORP27 patents · 37 citations
- 2213GM GLOBAL TECH OPERATIONS LLC96 patents · 104 citations
- 238VOLVO TRUCK CORP17 patents · 18 citations
- 244DEUTZ AG21 patents · 16 citations
- 251YANMAR POWER TECHNOLOGY CO LTD15 patents · 6 citations
Active· last 5 yrs
Sustained F02F output across the last 5 years
- 199CATERPILLAR INC241 patents · 3,219 citations
- 296HONDA MOTOR CO LTD595 patents · 9,426 citations
- 392TOYOTA MOTOR CO LTD424 patents · 5,844 citations
- 488NISSAN MOTOR268 patents · 4,750 citations
- 583FORD GLOBAL TECH LLC269 patents · 1,157 citations
- 679YAMAHA MOTOR CO LTD285 patents · 5,268 citations
- 775MAZDA MOTOR231 patents · 3,388 citations
- 871MITSUBISHI MOTORS CORP73 patents · 1,348 citations
- 967KOMATSU MFG CO LTD15 patents · 540 citations
- 1063ACHATES POWER INC48 patents · 301 citations
- 1158GEN ELECTRIC38 patents · 515 citations
- 1254AVL LIST GMBH60 patents · 728 citations
- 1350KAWASAKI HEAVY IND LTD55 patents · 800 citations
- 1446ISUZU MOTORS LTD61 patents · 989 citations
- 1542ISHIKAWA GASKET81 patents · 1,167 citations
- 1638DEERE & CO36 patents · 503 citations
- 1733BRUNSWICK CORP52 patents · 731 citations
- 1829MITSUBISHI HEAVY IND LTD20 patents · 231 citations
- 1925BAYERISCHE MOTOREN WERKE AG40 patents · 349 citations
- 2021BOSCH GMBH ROBERT37 patents · 485 citations
- 2117NIPPON PISTON RING CO LTD18 patents · 212 citations
- 2213BRP ROTAX GMBH & CO KG12 patents · 177 citations
- 238HYUNDAI MOTOR CO LTD137 patents · 505 citations
- 244VOLKSWAGEN AG25 patents · 246 citations
- 251FIAT RICERCHE9 patents · 114 citations
All-time canon
All-time PatentIndex Score in F02F
- 199LEMELSON JEROME H9 patents · 1,006 citations
- 296FORD MOTOR CO87 patents · 2,482 citations
- 392CATERPILLAR INC241 patents · 3,219 citations
- 488HONDA MOTOR CO LTD595 patents · 9,426 citations
- 583TOYOTA MOTOR CO LTD424 patents · 5,844 citations
- 679GEN MOTORS CORP125 patents · 3,373 citations
- 775HITACHI LTD52 patents · 1,210 citations
- 871NISSAN MOTOR268 patents · 4,750 citations
- 967CHRYSLER CORP34 patents · 1,175 citations
- 1063BOMBARDIER ROTAX GMBH11 patents · 335 citations
- 1158FORD GLOBAL TECH LLC269 patents · 1,157 citations
- 1254YAMAHA MOTOR CO LTD285 patents · 5,268 citations
- 1350CUMMINS ENGINE CO INC73 patents · 2,076 citations
- 1446FORD GLOBAL TECH INC42 patents · 1,174 citations
- 1542MAZDA MOTOR231 patents · 3,388 citations
- 1638FEDERAL MOGUL WORLD WIDE INC59 patents · 1,222 citations
- 1733MAHLE GMBH108 patents · 1,950 citations
- 1829NGK INSULATORS LTD38 patents · 982 citations
- 1925LEVITON MANUFACTURING CO5 patents · 231 citations
- 2021MITSUBISHI MOTORS CORP73 patents · 1,348 citations
- 2117KOMATSU MFG CO LTD15 patents · 540 citations
- 2213LUBRIZOL CORP8 patents · 469 citations
- 238ACHATES POWER INC48 patents · 301 citations
- 244TECUMSEH PRODUCTS CO27 patents · 690 citations
- 251DANA CORP57 patents · 1,243 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth