Topic leaderboard
Exhaust apparatus & gas-flow silencers
Ranked by the PatentIndex Score — a 1–99 percentile within F01N · public-visibility date · generated 2026
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest F01N patents became public in the last 2 years — the current frontier
- 199Joseph A. Patchett37 patents · 1,821 citations
- 296Shinichi Takeshima38 patents · 2,896 citations
- 392Magdi Khair28 patents · 815 citations
- 488Douglas Munroe Beall35 patents · 670 citations
- 583Cynthia Chaffin Webb47 patents · 658 citations
- 679Shiang Sung35 patents · 801 citations
- 775John K. Hochmuth20 patents · 694 citations
- 871Andrew Francis Chiffey63 patents · 772 citations
- 967Christopher Paul Glugla10 patents · 405 citations
- 1063Zachary D. Thobe7 patents · 197 citations
- 1158Paul Joseph Tennison23 patents · 471 citations
- 1254Francois Moreau33 patents · 317 citations
- 1350David Bergeal18 patents · 205 citations
- 1446Rahul Mital47 patents · 505 citations
- 1542Woodrow Woods37 patents · 568 citations
- 1638Wen-Mei Xue18 patents · 312 citations
- 1733Gerd Gaiser38 patents · 294 citations
- 1829Daniel Hatcher13 patents · 139 citations
- 1925Shuichi Ichikawa31 patents · 328 citations
- 2021Randolph G. Zoran22 patents · 305 citations
- 2117Matthew Tyler Caudle13 patents · 287 citations
- 2213Takao Onodera23 patents · 217 citations
- 238Korneel De Rudder24 patents · 148 citations
- 244Yukio Miyairi67 patents · 466 citations
- 251Erwin Achleitner11 patents · 160 citations
Active· last 5 yrs
Sustained F01N output across the last 5 years
- 199Joseph A. Patchett37 patents · 1,821 citations
- 296Shinichi Takeshima38 patents · 2,896 citations
- 392Jeffrey Scott Hepburn61 patents · 2,354 citations
- 488Patrick Burk16 patents · 816 citations
- 583Magdi Khair28 patents · 815 citations
- 679Guy Richard Chandler56 patents · 804 citations
- 775Douglas Munroe Beall35 patents · 670 citations
- 871Cynthia Chaffin Webb47 patents · 658 citations
- 967Shiang Sung35 patents · 801 citations
- 1063Paul M. Laing20 patents · 633 citations
- 1158John K. Hochmuth20 patents · 694 citations
- 1254Andrew Francis Chiffey63 patents · 772 citations
- 1350Naofumi Ochi17 patents · 485 citations
- 1446Shau-Lin F. Chen12 patents · 437 citations
- 1542Christopher Paul Glugla10 patents · 405 citations
- 1638Bruce Hoppenstedt18 patents · 526 citations
- 1733Sanath Kumar15 patents · 407 citations
- 1829Zachary D. Thobe7 patents · 197 citations
- 1925Paul Joseph Tennison23 patents · 471 citations
- 2021Brian T. Ignaczak21 patents · 449 citations
- 2117Francois Moreau33 patents · 317 citations
- 2213John Benjamin Goodwin24 patents · 311 citations
- 238Tadato Ito15 patents · 337 citations
- 244Yisun Cheng14 patents · 251 citations
- 251Gavin Michael Brown20 patents · 267 citations
All-time canon
Career PatentIndex Score in F01N
- 199Alex J. Severinsky13 patents · 1,507 citations
- 296Theodore Louckes13 patents · 1,507 citations
- 392Koji Shimato8 patents · 1,316 citations
- 488Joseph A. Patchett37 patents · 1,821 citations
- 583Kazushige Ohno84 patents · 1,730 citations
- 679Theodore J. Tarabulski13 patents · 1,874 citations
- 775Axel O. Zur Loye14 patents · 786 citations
- 871Jeremy D. Peter-Hoblyn16 patents · 2,227 citations
- 967John Lawrence Calabrese6 patents · 924 citations
- 1063Patrick M. Pierz7 patents · 656 citations
- 1158Ronald J. Parise7 patents · 1,307 citations
- 1254Shinichi Takeshima38 patents · 2,896 citations
- 1350Karl Richard Grimston6 patents · 720 citations
- 1446Jeffrey Scott Hepburn61 patents · 2,354 citations
- 1542Stephen M. Sanocki16 patents · 1,162 citations
- 1638David K. Benson11 patents · 1,251 citations
- 1733Thomas F. Potter9 patents · 1,241 citations
- 1829Kiyoshi Kobashi21 patents · 1,724 citations
- 1925Gary W. Rice9 patents · 786 citations
- 2021Lothar Hofmann20 patents · 1,625 citations
- 2117Wieland Mathes17 patents · 1,440 citations
- 2213Roger L. Langer16 patents · 1,319 citations
- 238Haoran Hu11 patents · 902 citations
- 244Robert Henry Hammerle19 patents · 1,234 citations
- 251Yukio Kinugasa18 patents · 1,764 citations
Rising· last 2 yrs
The top-scoring F01N patents made public in the last 2 years
- 199US12006014B1✦ AIExhaust vent hoods for marine vessels and related methods21 cites · 202482% earned
- 296US12043361B1✦ AIExhaust handling systems for marine vessels and related methods18 cites · 202481% earned
- 392US11927121B1✦ AIMuffler assemblies for snowmobiles14 cites · 202483% earned
- 488US12152525B2Real-time control of reductant droplet spray momentum and in-exhaust spray distribution2 cites · 202455% earned
- 583US11981562B2Systems and methods for the on-board catalytic production of hydrogen from ammonia using a3 cites · 202472% earned
- 679US12409434B1Systems and methods for sequential energization of heating elements in an electric catalys1 cites · 202556% earned
- 775US11946679B1Exhaust gas heat recovery from cryo-compression engines with cogeneration of cryo-working 3 cites · 202480% earned
- 871US11879420B1System and method for controlling ignition coil3 cites · 202480% earned
- 967US11946398B1Broadband resonator with an entrained water removal system for a fuel cell compressor3 cites · 202480% earned
- 1063US12234757B1Methods and systems for regenerating a particulate filter2 cites · 202576% earned
- 1158US11913401B1Engine emission control systems for deceleration fuel cutoff events and cold starts2 cites · 202476% earned
- 1254US12104515B2Method, computing unit, and computer program for operating a burner2 cites · 202476% earned
- 1350US12441295B2System and methods for in-use NOx robustness emission control2 cites · 202476% earned
- 1446US12415477B1Catalytic converter anti-theft system2 cites · 202576% earned
- 1542US11965447B2Method for controlling an exhaust-gas aftertreatment system of an internal combustion engi2 cites · 202476% earned
- 1638US12012884B1Engine with exhaust heater2 cites · 202476% earned
- 1733US11952929B1Hydracarbon dozer valve pivoting multi purpose bracket2 cites · 202476% earned
- 1829US11965445B1Fastening structure and method for designing fastening structure2 cites · 202476% earned
- 1925US12158091B2V-type engine, outboard motor, and watercraft3 cites · 202480% earned
- 2021US12203401B2Scalable greenhouse gas capture systems and methods1 cites · 202440% earned
- 2117US12245339B2Electrical heaters for exhaust aftertreatment systems and assemblies1 cites · 202450% earned
- 2213US12152517B2Systems and methods for compensating NOx sensor measurements to meet sufficiency requireme2 cites · 202467% earned
- 238US12228071B1Steam-injected engine heat exchanger arrangement1 cites · 202567% earned
- 244US12168949B2Method for powering a heating device for a catalytic converter2 cites · 202476% earned
- 251US12515512B2Electrified vehicle1 cites · 202467% earned
Active· last 5 yrs
The top-scoring F01N patents of the last 5 years
- 199US11105250B1✦ AIRain shield assembly, pipe assembly and turbine fracturing unit138 cites · 202190% earned
- 296US11578638B2✦ AIScalable greenhouse gas capture systems and methods73 cites · 202281% earned
- 392US11428165B2✦ AIOnboard heater of auxiliary systems using exhaust gases and associated methods66 cites · 202181% earned
- 488US12006014B1Exhaust vent hoods for marine vessels and related methods21 cites · 202482% earned
- 583US11325687B1Multiple duct system for conveying exhaust gas from oceangoing vessels to a treatment syst34 cites · 202291% earned
- 679US12012883B2Systems and methods for backhaul transportation of liquefied gas and CO2 using liquefied g19 cites · 202385% earned
- 775US12043361B1Exhaust handling systems for marine vessels and related methods18 cites · 202481% earned
- 871US11927121B1Muffler assemblies for snowmobiles14 cites · 202483% earned
- 967US10934918B1Combined urea hydrolysis and selective catalytic reduction for emissions control29 cites · 202191% earned
- 1063US11181026B1Methods for operation of an emissions aftertreatment system for NOx control during regener22 cites · 202185% earned
- 1158US11193438B1Emissions control during engine cold starts17 cites · 202189% earned
- 1254US10914218B1Exhaust gas aftertreatment system with mixing features23 cites · 202190% earned
- 1350US10914212B148V electrically heated catalyst system for a vehicle22 cites · 202190% earned
- 1446US11746684B2Exhaust aftertreatment arrangement for converting NOx emissions12 cites · 202288% earned
- 1542US11598276B1Methods and systems for multi-fuel engine13 cites · 202388% earned
- 1638US11428140B1Mixer assembly for vehicle exhaust system13 cites · 202288% earned
- 1733US11268424B2Exhaust gas purification device15 cites · 202189% earned
- 1829US11519313B1Methods and systems for engine exhaust catalyst operations12 cites · 202288% earned
- 1925US11591943B2Serviceable catalyst and mixer unit for vehicle exhaust system14 cites · 202189% earned
- 2021US11448155B2Process for testing a plurality of components of an exhaust gas aftertreatment system14 cites · 202189% earned
- 2117US11193412B2Automotive exhaust aftertreatment system16 cites · 202189% earned
- 2213US11982218B2Palladium diesel oxidation catalyst9 cites · 202281% earned
- 238US11428133B2Systems and methods for managing catalyst temperature based on location11 cites · 202188% earned
- 244US11261770B1Catalyst light off using purge fuel and e-booster11 cites · 202288% earned
- 251US11506101B2After treatment system for a vehicle13 cites · 202288% earned
All-time canon
The defining F01N patents of the whole record
- 199US4329162A✦ AIDiesel particulate trap539 cites · 198295% earned
- 296US7068991B2✦ AIRemote power recharge for electronic equipment507 cites · 200495% earned
- 392US4880078A✦ AIExhaust muffler481 cites · 198995% earned
- 488US5914187ACeramic structural body435 cites · 199995% earned
- 583US6554088B2Hybrid vehicles406 cites · 200180% earned
- 679US4902487ATreatment of diesel exhaust gases403 cites · 199095% earned
- 775US6669751B1Honeycomb filter and ceramic filter assembly399 cites · 200385% earned
- 871US6063350AReducing nox emissions from an engine by temperature-controlled urea injection for selecti392 cites · 200095% earned
- 967US5750026ADevice for removal of contaminants from fluid streams390 cites · 199895% earned
- 1063US5974791AExhaust gas purification device for an internal combustion engine345 cites · 199994% earned
- 1158US5473887AExhaust purification device of internal combustion engine340 cites · 199594% earned
- 1254US5380580AFlexible nonwoven mat333 cites · 199594% earned
- 1350US5884475AMethod and device for introducing liquid into an exhaust-gas purification system325 cites · 199994% earned
- 1446US5272871AMethod and apparatus for reducing nitrogen oxides from internal combustion engine319 cites · 199394% earned
- 1542US5597771ALayered catalyst composite314 cites · 199794% earned
- 1638US6125629AStaged reductant injection for improved NOx reduction303 cites · 200094% earned
- 1733US4417908AHoneycomb filter and method of making it296 cites · 198394% earned
- 1829US5628186AMethod and apparatus for controlled introduction of a reducing agent into a nitrogen oxide291 cites · 199794% earned
- 1925US6301887B1Low pressure EGR system for diesel engines290 cites · 200194% earned
- 2021US4651524AExhaust processor284 cites · 198794% earned
- 2117US5522218ACombustion exhaust purification system and method280 cites · 199694% earned
- 2213US6406066B1Connecting structure for exhaust pipes280 cites · 200294% earned
- 238US6449947B1Low pressure injection and turbulent mixing in selective catalytic reduction system276 cites · 200294% earned
- 244US5746989AMethod for purifying exhaust gas of a diesel engine275 cites · 199894% earned
- 251US6314722B1Method and apparatus for emission control272 cites · 200194% earned
Rising· last 2 yrs
Assignees whose newest F01N patents became public in the last 2 years — the current frontier
- 199IBIDEN CO LTD170 patents · 3,751 citations
- 296TOYOTA MOTOR CO LTD1,458 patents · 23,700 citations
- 392CUMMINS INC309 patents · 2,307 citations
- 488HONDA MOTOR CO LTD673 patents · 11,470 citations
- 583FORD GLOBAL TECH LLC1,105 patents · 11,090 citations
- 679CORNING INC198 patents · 5,411 citations
- 775CATERPILLAR INC397 patents · 5,669 citations
- 871JOHNSON MATTHEY PLC313 patents · 3,610 citations
- 967NGK INSULATORS LTD665 patents · 8,260 citations
- 1063NISSAN MOTOR409 patents · 10,138 citations
- 1158DONALDSON CO INC108 patents · 3,117 citations
- 1254SOUTHWEST RES INST92 patents · 2,093 citations
- 1350BOSCH GMBH ROBERT498 patents · 6,386 citations
- 1446ISUZU MOTORS LTD179 patents · 2,032 citations
- 1542MAZDA MOTOR185 patents · 3,247 citations
- 1638DENSO CORP317 patents · 3,595 citations
- 1733BASF CORP164 patents · 1,207 citations
- 1829DEERE & CO100 patents · 899 citations
- 1925HONEYWELL INT INC48 patents · 967 citations
- 2021YAMAHA MOTOR CO LTD194 patents · 2,792 citations
- 2117BRUNSWICK CORP115 patents · 1,875 citations
- 2213KOMATSU MFG CO LTD129 patents · 1,301 citations
- 238VOLKSWAGEN AG125 patents · 1,146 citations
- 244UMICORE AG & CO KG155 patents · 816 citations
- 251MARATHON PETROLEUM CO LP12 patents · 236 citations
Active· last 5 yrs
Sustained F01N output across the last 5 years
- 199IBIDEN CO LTD170 patents · 3,751 citations
- 296TOYOTA MOTOR CO LTD1,458 patents · 23,700 citations
- 392CUMMINS INC309 patents · 2,307 citations
- 488SIEMENS AG111 patents · 4,790 citations
- 583HONDA MOTOR CO LTD673 patents · 11,470 citations
- 679FORD GLOBAL TECH LLC1,105 patents · 11,090 citations
- 775CORNING INC198 patents · 5,411 citations
- 871CATERPILLAR INC397 patents · 5,669 citations
- 967JOHNSON MATTHEY PLC313 patents · 3,610 citations
- 1063NGK INSULATORS LTD665 patents · 8,260 citations
- 1158NISSAN MOTOR409 patents · 10,138 citations
- 12543M INNOVATIVE PROPERTIES CO46 patents · 1,164 citations
- 1350HITACHI LTD115 patents · 3,145 citations
- 1446DONALDSON CO INC108 patents · 3,117 citations
- 1542SOUTHWEST RES INST92 patents · 2,093 citations
- 1638BOSCH GMBH ROBERT498 patents · 6,386 citations
- 1733UNIV CALIFORNIA17 patents · 924 citations
- 1829ISUZU MOTORS LTD179 patents · 2,032 citations
- 1925MAZDA MOTOR185 patents · 3,247 citations
- 2021DENSO CORP317 patents · 3,595 citations
- 2117BASF CORP164 patents · 1,207 citations
- 2213DEERE & CO100 patents · 899 citations
- 238NGK SPARK PLUG CO66 patents · 758 citations
- 244HONEYWELL INT INC48 patents · 967 citations
- 251HINO MOTORS LTD63 patents · 733 citations
All-time canon
All-time PatentIndex Score in F01N
- 199PAICE LLC8 patents · 1,016 citations
- 296IBIDEN CO LTD170 patents · 3,751 citations
- 392ENGELHARD CORP72 patents · 6,519 citations
- 488TOYOTA MOTOR CO LTD1,458 patents · 23,700 citations
- 583CORNING GLASS WORKS20 patents · 2,201 citations
- 679CUMMINS INC309 patents · 2,307 citations
- 775SIEMENS AG111 patents · 4,790 citations
- 871CLEAN DIESEL TECH INC23 patents · 2,077 citations
- 967FORD GLOBAL TECH INC175 patents · 8,354 citations
- 1063HONDA MOTOR CO LTD673 patents · 11,470 citations
- 1158MINNESOTA MINING & MFG39 patents · 3,788 citations
- 1254FORD GLOBAL TECH LLC1,105 patents · 11,090 citations
- 1350BASF CATALYSTS LLC16 patents · 1,066 citations
- 1446CORNING INC198 patents · 5,411 citations
- 1542CATERPILLAR INC397 patents · 5,669 citations
- 1638MIDWEST RESEARCH INST8 patents · 1,141 citations
- 1733MITSUBISHI MOTORS CORP107 patents · 3,246 citations
- 1829FORD MOTOR CO128 patents · 4,922 citations
- 1925JOHNSON MATTHEY PLC313 patents · 3,610 citations
- 2021NGK INSULATORS LTD665 patents · 8,260 citations
- 2117EATON CORP41 patents · 1,558 citations
- 2213NISSAN MOTOR409 patents · 10,138 citations
- 238GEN MOTORS CORP254 patents · 8,976 citations
- 2443M INNOVATIVE PROPERTIES CO46 patents · 1,164 citations
- 251HITACHI LTD115 patents · 3,145 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth