Topic leaderboard
Mine safety devices, transport & ventilation
Ranked by the PatentIndex Score — a 1–99 percentile within E21F · public-visibility date · generated 2026-07-19
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest E21F patents became public in the last 2 years — the current frontier
- 199Anye Cao3 patents · 121 citations
- 296Yaoqi Liu3 patents · 121 citations
- 392Linming Dou2 patents · 121 citations
- 488Siyuan Gong2 patents · 121 citations
- 583Wu Cai2 patents · 121 citations
- 679Charles Elkins5 patents · 6 citations
- 775Changbin Wang2 patents · 116 citations
- 871Benjamin John Robert Lepre5 patents · 1 citations
- 967Qiang Niu1 patents · 116 citations
- 1063Tongbin Zhao3 patents · 6 citations
- 1158Yifan Zeng9 patents · 6 citations
- 1254Kai Pang4 patents · 6 citations
- 1350Chongbang Xu1 patents · 15 citations
- 1446Xiao Xu1 patents · 15 citations
- 1542Yuxing Peng6 patents · 2 citations
- 1638Zhencai Zhu11 patents · 2 citations
- 1733Aoshuang Mei3 patents · 6 citations
- 1829Dun Chen1 patents · 11 citations
- 1925Guoyu Li1 patents · 11 citations
- 2021Yapeng Cao1 patents · 11 citations
- 2117Xiufeng Zhang3 patents · 4 citations
- 2213Lu Wang2 patents · 6 citations
- 238Botao Qin4 patents · 2 citations
- 244Jun Guo3 patents · 3 citations
- 251Xiaohua Bao2 patents · 4 citations
Active· last 5 yrs
Sustained E21F output across the last 5 years
- 199Aaron Philip Walker10 patents · 45 citations
- 296Christopher George Stewart10 patents · 45 citations
- 392Ross Tessien7 patents · 30 citations
- 488Yishan Pan4 patents · 86 citations
- 583Lianpeng Dai3 patents · 82 citations
- 679Edward F. Niederriter5 patents · 33 citations
- 775Joshua Stephen Behling4 patents · 12 citations
- 871Manchao He4 patents · 37 citations
- 967Anye Cao3 patents · 121 citations
- 1063Yaoqi Liu3 patents · 121 citations
- 1158Charles W. Watson5 patents · 20 citations
- 1254Susan A. Ellerbusch4 patents · 17 citations
- 1350Linming Dou2 patents · 121 citations
- 1446Siyuan Gong2 patents · 121 citations
- 1542Wu Cai2 patents · 121 citations
- 1638Erik Rasmussen3 patents · 12 citations
- 1733Roy W. Tivas3 patents · 12 citations
- 1829Charles Elkins5 patents · 6 citations
- 1925Antti Lehtinen4 patents · 31 citations
- 2021Jarkko Ruokojärvi4 patents · 31 citations
- 2117Aiwen Wang2 patents · 37 citations
- 2213Louis A. Waters, Jr.9 patents · 21 citations
- 238Thomas Harmon Harris4 patents · 11 citations
- 244Jixiong Zhang12 patents · 7 citations
- 251Kazunari Kawai10 patents · 9 citations
All-time canon
Career PatentIndex Score in E21F
- 199Joseph A. Zupanick25 patents · 1,165 citations
- 296Walter L. Richards6 patents · 460 citations
- 392Arnold W. J. Grupping5 patents · 514 citations
- 488Albert E. Lynch4 patents · 204 citations
- 583David L. Conley4 patents · 204 citations
- 679David E. Price4 patents · 204 citations
- 775John J. Sartaine4 patents · 204 citations
- 871John Susla4 patents · 204 citations
- 967Larry M. Addington4 patents · 204 citations
- 1063Larry C. Addington4 patents · 204 citations
- 1158Robert R. Addington4 patents · 204 citations
- 1254Terry M. Thomas6 patents · 108 citations
- 1350Walter Weirich8 patents · 122 citations
- 1446David A. Hussey7 patents · 117 citations
- 1542Dennis Mraz7 patents · 74 citations
- 1638Aaron Philip Walker10 patents · 45 citations
- 1733Christopher George Stewart10 patents · 45 citations
- 1829Vesper A. Vaseen3 patents · 395 citations
- 1925Xerxes T. Stoddard3 patents · 395 citations
- 2021Paul Emile Van Es6 patents · 65 citations
- 2117Michael Kobler4 patents · 149 citations
- 2213Gareth Rimmington14 patents · 84 citations
- 238Angelo A. Petitto5 patents · 66 citations
- 244Ruel C. Terry3 patents · 353 citations
- 251Ronald D. Drake3 patents · 148 citations
Rising· last 2 yrs
The top-scoring E21F patents made public in the last 2 years
- 199US12123995B1✦ AIIntelligent monitoring and early warning device and method for rock burst based on multi-f116 cites · 202493% earned
- 296US12135257B1✦ AIPerception evaluation method for service performance of highway tunnel lining structure15 cites · 202489% earned
- 392US12084973B1✦ AIBlockage-proof water diversion and drainage devices for highway tunnel construction11 cites · 202488% earned
- 488US12203374B1System for monitoring overlying roof rock and coal pillar of gob-side entry and method the4 cites · 202582% earned
- 583US12091976B1Method for monitoring resilience of shield tunnel based on multi-source heterogeneous data4 cites · 202482% earned
- 679US12234732B1Monitoring and warning device for rock burst in coal mine2 cites · 202576% earned
- 775US12037908B1Method for monitoring and analyzing large tunnel machines based on automatic collection of2 cites · 202476% earned
- 871US11891897B1Integrated manufacturing system and method for small-deformation self-diagnosis shield seg1 cites · 202467% earned
- 967US12331644B2Water dispensing management for autonomous machines1 cites · 202467% earned
- 1063US12158047B2Apparatus and method for controlling flushing in rock drilling1 cites · 202467% earned
- 1158US12391483B2Systems and methods for automated control of a beam stageloader bootend0 cites · 20240% earned
- 1254US12214390B2Portable gas monitor0 cites · 20240% earned
- 1350US12590541B2Power optimization through orchestration and prioritization of machines and functions0 cites · 20240% earned
- 1446US12179809B2Track structure with center rail0 cites · 20240% earned
- 1542US11920390B1Latch assembly for a mine door and a mine door having such an assembly0 cites · 20240% earned
- 1638US12306073B2Ultra-large physical simulation facility for deep engineering disasters0 cites · 20240% earned
- 1733US12312958B1Method of segmented grouting for repairing aquifers in mining area0 cites · 20250% earned
- 1829US12196076B1Grouting and water blocking method for directional hole with large offset in hard rock str0 cites · 20250% earned
- 1925US12179814B2Subway tunnel intelligent monitoring method and system0 cites · 20240% earned
- 2021US12416237B1Methods for grout injection repair and water retention in goaf0 cites · 20250% earned
- 2117US12071375B1Cemented filling material with bionic structure and preparation method and application the0 cites · 20240% earned
- 2213US12091971B2Tracer diffusion device, system for tracing development of water conducting fracture zone 0 cites · 20240% earned
- 238US11959379B2Method for measuring gas pressure of close-distance seam group simultaneously0 cites · 20240% earned
- 244US12241371B1Integrated mining method of coal breaking, coal extraction and water circulation in U-well0 cites · 20250% earned
- 251US12420663B1High-energy-efficiency lithium battery monorail hoist locomotive and battery management sy0 cites · 20250% earned
Active· last 5 yrs
The top-scoring E21F patents of the last 5 years
- 199US12123995B1✦ AIIntelligent monitoring and early warning device and method for rock burst based on multi-f116 cites · 202493% earned
- 296US11492891B1✦ AIMethod and apparatus of controlling drilling for rock burst prevention in coal mine roadwa45 cites · 202292% earned
- 392US12135257B1✦ AIPerception evaluation method for service performance of highway tunnel lining structure15 cites · 202489% earned
- 488US11761335B1Determining method for bursting-preventing parameter of roadway support for rock burst in 20 cites · 202390% earned
- 583US11493656B1Full probability-based seismic risk analysis method for tunnel under fault dislocation24 cites · 202290% earned
- 679US11085859B1Experimental system and method for simulating effect of fault stick-slip displacement on t28 cites · 202191% earned
- 775US12084973B1Blockage-proof water diversion and drainage devices for highway tunnel construction11 cites · 202488% earned
- 871US11187081B1Self-anchored opposite-pulling anti-impact anchor cable for sectional coal pillars and usi17 cites · 202189% earned
- 967US11319810B1Monitoring device for deformation of locked patch crack of rock slope and arrangement meth11 cites · 202288% earned
- 1063US11136740B1Underwater traffic tunnel12 cites · 202188% earned
- 1158US12203374B1System for monitoring overlying roof rock and coal pillar of gob-side entry and method the4 cites · 202582% earned
- 1254US11459849B1Filling bag and sealing method for drilled hole for detection in three zones of overburden6 cites · 202285% earned
- 1350US11821317B1Coal or rock dynamic disaster warning apparatus and method4 cites · 202382% earned
- 1446US12091976B1Method for monitoring resilience of shield tunnel based on multi-source heterogeneous data4 cites · 202482% earned
- 1542US11148885B1Trailing sandwich conveyor system for continuous mining machines along a high-angle tunnel6 cites · 202178% earned
- 1638US11326452B1Similar simulation experimental device of hydraulic energy-absorbing roadway support5 cites · 202284% earned
- 1733US12234732B1Monitoring and warning device for rock burst in coal mine2 cites · 202576% earned
- 1829US11826914B1Mechanical arm type measuring robot device and application method3 cites · 202380% earned
- 1925US11414273B2System and method for compressed air energy storage5 cites · 202184% earned
- 2021US11807279B2Track structure with hollow center rail usable as ventilation duct2 cites · 202367% earned
- 2117US11180318B1Method and system for selecting and using a salt cavern to store very pure hydrogen6 cites · 202185% earned
- 2213US12037908B1Method for monitoring and analyzing large tunnel machines based on automatic collection of2 cites · 202476% earned
- 238US11511943B2Sensor systems and methods for detecting conveyor tension in a mining system3 cites · 202161% earned
- 244US11421532B2Plug for a void, system and method3 cites · 202161% earned
- 251US12012855B2Rotary boring mining machine inertial steering system2 cites · 202258% earned
All-time canon
The defining E21F patents of the whole record
- 199US4243101A✦ AICoal gasification method340 cites · 198194% earned
- 296US6969123B2✦ AIUpgrading and mining of coal340 cites · 200394% earned
- 392US4495496A✦ AIPersonnel monitoring and locating system327 cites · 198594% earned
- 488US4651836AProcess for recovering methane gas from subterranean coalseams225 cites · 198794% earned
- 583US5879057AHorizontal remote mining system, and method218 cites · 199994% earned
- 679US4417992ADust control173 cites · 198394% earned
- 775US4463807AMinimizing subsidence effects during production of coal in situ172 cites · 198494% earned
- 871US6280000B1Method for production of gas from a coal seam using intersecting well bores171 cites · 200180% earned
- 967US3934649AMethod for removal of methane from coalbeds168 cites · 197694% earned
- 1063US4968978ALong range multiple point wireless control and monitoring system166 cites · 199094% earned
- 1158US4448252AMinimizing subsidence effects during production of coal in situ161 cites · 198494% earned
- 1254US4237182AMethod of sealing interior mine surface with a fire retardant hydrophilic polyurethane foa155 cites · 198094% earned
- 1350US5087099ALong range multiple point wireless control and monitoring system153 cites · 199290% earned
- 1446US5269660AMethod and an installation for adjusting the flow rate of air in a network of ducts143 cites · 199393% earned
- 1542US4043395AMethod for removing methane from coal142 cites · 197793% earned
- 1638US6357523B1Drainage pattern with intersecting wells drilled from surface140 cites · 200279% earned
- 1733US7441809B1Modular mine service vehicle140 cites · 200893% earned
- 1829US6617973B1Underground battery vault system for communications applications138 cites · 200393% earned
- 1925US4978172AGob methane drainage system132 cites · 199093% earned
- 2021US6024171AMethod for stimulating a wellbore penetrating a solid carbonaceous subterranean formation130 cites · 200093% earned
- 2117US6679322B1Method and system for accessing subterranean deposits from the surface126 cites · 200490% earned
- 2213US12123995B1Intelligent monitoring and early warning device and method for rock burst based on multi-f116 cites · 202493% earned
- 238US4495495AStaff-location and signalling system for use in mines113 cites · 198593% earned
- 244US5431482AHorizontal natural gas storage caverns and methods for producing same111 cites · 199593% earned
- 251US5840221AProcess for making silicon carbide reinforced silicon carbide composite107 cites · 199889% earned
Rising· last 2 yrs
Assignees whose newest E21F patents became public in the last 2 years — the current frontier
- 199CATERPILLAR INC12 patents · 80 citations
- 296UNIV CHINA MINING86 patents · 166 citations
- 392JOY GLOBAL UNDERGROUND MINING LLC25 patents · 34 citations
- 488JACK KENNEDY METAL PRODUCTS & BUILDINGS INC10 patents · 13 citations
- 583UNIV SHANDONG SCIENCE & TECH23 patents · 13 citations
- 679UNIV TAIYUAN TECHNOLOGY12 patents · 7 citations
- 775SANDVIK MINING & CONSTRUCTION OY8 patents · 7 citations
- 871ELKINS EARTHWORKS LLC4 patents · 2 citations
- 967MODULAR MINING SYSTEMS INC3 patents · 4 citations
- 1063RES INST HIGHWAY MINI TRANSP1 patents · 15 citations
- 1158NORTHWEST INSTITUTE ECO ENVIRONMENT & RESOURCES CAS1 patents · 11 citations
- 1254UNIV SHENZHEN3 patents · 4 citations
- 1350UNIV ANHUI SCI & TECHNOLOGY10 patents · 1 citations
- 1446RIINO INC2 patents · 2 citations
- 1542UNIV HENAN POLYTECHNIC2 patents · 2 citations
- 1638CHINA TIESIJU CIVIL ENG GROUP CO LTD1 patents · 2 citations
- 1733CNBM TECH INNOVATION ACADEMY SHANDONG CO LTD1 patents · 1 citations
- 1829CHINA UNIV OF PETROLEUM (BEIJING)2 patents · 0 citations
- 1925UNIV NORTHEASTERN2 patents · 0 citations
- 2021ANGLO AMERICAN STEELMAKING COAL PTY LTD1 patents · 0 citations
- 2117BEIJING URBAN CONSTRUCTION DESIGN&DEVELOPMENT GROUP CO LTD1 patents · 0 citations
- 2213CCTEG TAIYUAN RES INSTITUTE1 patents · 0 citations
- 238CHINA UNIV OF MINING & TECHNOLOGY—BEIJING1 patents · 0 citations
- 244DRILL TECH DRILLING & SHORING INC1 patents · 0 citations
- 251ENVEKS TOZ KONTROL TEKNOLOJILERI SANAYI VE TICARET ANONIM SIRKETI1 patents · 0 citations
Active· last 5 yrs
Sustained E21F output across the last 5 years
- 199KOMATSU MFG CO LTD20 patents · 111 citations
- 296CATERPILLAR INC12 patents · 80 citations
- 392UNIV CHINA MINING86 patents · 166 citations
- 488Electricwaze LLC7 patents · 30 citations
- 583JOY GLOBAL UNDERGROUND MINING LLC25 patents · 34 citations
- 679UNIV LIAONING4 patents · 86 citations
- 775BEHLING JOSHUA STEPHEN4 patents · 12 citations
- 871JACK KENNEDY METAL PRODUCTS & BUILDINGS INC10 patents · 13 citations
- 967UNIV SHANDONG SCIENCE & TECH23 patents · 13 citations
- 1063AIR LIQUIDE LARGE IND US LP4 patents · 17 citations
- 1158MOSAIC CO3 patents · 12 citations
- 1254E DILLON & COMPANY4 patents · 11 citations
- 1350UNIV TAIYUAN TECHNOLOGY12 patents · 7 citations
- 1446SANDVIK MINING & CONSTRUCTION OY8 patents · 7 citations
- 1542FLOODBREAK L L C7 patents · 16 citations
- 1638ELKINS EARTHWORKS LLC4 patents · 2 citations
- 1733DOS SANTOS JOSEPH ANIBAL2 patents · 9 citations
- 1829Caterpillar Underground Mining Pty Ltd3 patents · 6 citations
- 1925INST GEOLOGY & GEOPHYSICS CAS1 patents · 28 citations
- 2021UNIV SOUTHWEST JIAOTONG1 patents · 24 citations
- 2117MODULAR MINING SYSTEMS INC3 patents · 4 citations
- 2213NEPEAN CONVEYORS PTY LTD2 patents · 8 citations
- 238UNIV BEIJING SCIENCE & TECHNOLOGY3 patents · 4 citations
- 244RES INST HIGHWAY MINI TRANSP1 patents · 15 citations
- 251DU DI1 patents · 12 citations
All-time canon
All-time PatentIndex Score in E21F
- 199CDX GAS LLC13 patents · 945 citations
- 296STOLAR INC5 patents · 487 citations
- 392METHANE DRAINAGE VENTURES6 patents · 460 citations
- 488KENNEDY JACK METAL PROD21 patents · 585 citations
- 583US INTERIOR28 patents · 457 citations
- 679JOY MM DELAWARE INC68 patents · 446 citations
- 775BERGWERKSVERBAND GMBH11 patents · 238 citations
- 871GEWERK EISENHUETTE WESTFALIA42 patents · 399 citations
- 967CONTINENTAL OIL CO9 patents · 272 citations
- 1063CONOCO INC11 patents · 228 citations
- 1158CONSOLIDATION COAL CO6 patents · 194 citations
- 1254COAL INDUSTRY PATENTS LTD17 patents · 215 citations
- 1350GEN ELECTRIC7 patents · 154 citations
- 1446JOY TECHNOLOGIES INC6 patents · 137 citations
- 1542JOY MFG CO8 patents · 146 citations
- 1638RUHRKOHLE AG8 patents · 180 citations
- 1733US HEALTH5 patents · 133 citations
- 1829IN SITU TECHNOLOGY INC3 patents · 395 citations
- 1925KOMATSU MFG CO LTD20 patents · 111 citations
- 2021SUPERIOR HIGHWALL MINERS INC5 patents · 65 citations
- 2117CATERPILLAR INC12 patents · 80 citations
- 2213LONG AIRDOX CO6 patents · 64 citations
- 238DM TECHNOLOGIES LTD5 patents · 49 citations
- 244UNIV CHINA MINING86 patents · 166 citations
- 251OIL SANDS UNDERGROUND MINING I3 patents · 148 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth