Topic leaderboard
Mining or quarrying
Ranked by the PatentIndex Score — a 1–99 percentile within E21C · public-visibility date · generated 2026-07-19
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest E21C patents became public in the last 2 years — the current frontier
- 199Phillip Sollami89 patents · 3,636 citations
- 296Bradley M. Neilson12 patents · 42 citations
- 392Christian Berning43 patents · 112 citations
- 488Shawn W. Franklin11 patents · 44 citations
- 583Peter A. Lugg13 patents · 26 citations
- 679Geoffrey W. Keech12 patents · 25 citations
- 775Philip Verhaelen8 patents · 19 citations
- 871James R. Geyer7 patents · 16 citations
- 967Chris Salvino9 patents · 14 citations
- 1063Andrew D. Hunter5 patents · 17 citations
- 1158Christopher Coates5 patents · 17 citations
- 1254Ian B. Schirmer5 patents · 17 citations
- 1350Russell P. Smith5 patents · 17 citations
- 1446Philip Metzger5 patents · 9 citations
- 1542Ryan E. Perry5 patents · 7 citations
- 1638Tongbin Zhao3 patents · 11 citations
- 1733Benjamin John Robert Lepre5 patents · 1 citations
- 1829Arkadiusz Dlugosz3 patents · 8 citations
- 1925Leroy G. Hagenbuch3 patents · 5 citations
- 2021Eric S. Engelmann4 patents · 5 citations
- 2117Wei Geng2 patents · 7 citations
- 2213Weiyao Guo2 patents · 7 citations
- 238Yunliang Tan2 patents · 7 citations
- 244Zhilei Sun2 patents · 7 citations
- 251Matthew-David S. Frantz3 patents · 8 citations
Active· last 5 yrs
Sustained E21C output across the last 5 years
- 199Phillip Sollami89 patents · 3,636 citations
- 296William M. Moeny18 patents · 774 citations
- 392Ronald B. Crockett63 patents · 2,173 citations
- 488Stefan Wagner29 patents · 246 citations
- 583William P. Sulosky7 patents · 154 citations
- 679Chapman Young, Iii6 patents · 225 citations
- 775Joel C. Sercel9 patents · 108 citations
- 871Daniel Mouthaan10 patents · 180 citations
- 967Christopher George Stewart13 patents · 103 citations
- 1063Regan Leland Burton15 patents · 94 citations
- 1158Francis Leany10 patents · 165 citations
- 1254Karsten Buhr30 patents · 159 citations
- 1350Aaron Philip Walker10 patents · 45 citations
- 1446Edward F. Niederriter20 patents · 80 citations
- 1542Bradley M. Neilson12 patents · 42 citations
- 1638Christian Berning43 patents · 112 citations
- 1733Joaquim Antonio Soares De Sousa11 patents · 81 citations
- 1829Heiko Friederichs16 patents · 57 citations
- 1925Roy W. Tivas5 patents · 34 citations
- 2021Andrew E. Dadson7 patents · 37 citations
- 2117Mohammad N. Sani7 patents · 37 citations
- 2213Shawn W. Franklin11 patents · 44 citations
- 238Bernhard Ebner12 patents · 61 citations
- 244Richard Nicoson7 patents · 28 citations
- 251Winfried Von Schönebeck7 patents · 53 citations
All-time canon
Career PatentIndex Score in E21C
- 199Greg Stump7 patents · 810 citations
- 296Phillip Sollami89 patents · 3,636 citations
- 392Edward V. Conley10 patents · 824 citations
- 488Ted R. Massa15 patents · 961 citations
- 583Wayne H. Beach21 patents · 1,329 citations
- 679John S. Van Kirk5 patents · 480 citations
- 775Robert H. Montgomery, Jr.14 patents · 1,171 citations
- 871Michael L. O'Neill24 patents · 824 citations
- 967William M. Moeny18 patents · 774 citations
- 1063Stephen P. Stiffler15 patents · 954 citations
- 1158Karl Kammerer24 patents · 852 citations
- 1254Kenneth C. Emmerich8 patents · 699 citations
- 1350Ronald B. Crockett63 patents · 2,173 citations
- 1446Jeff Jepson38 patents · 1,911 citations
- 1542Leroy E. Den Besten5 patents · 610 citations
- 1638Winchester E. Latham19 patents · 775 citations
- 1733Richard D. Ridley18 patents · 646 citations
- 1829Gordon B. French19 patents · 644 citations
- 1925Scott Dahlgren24 patents · 768 citations
- 2021Cary D. Ritchey8 patents · 407 citations
- 2117Bernd Holl16 patents · 516 citations
- 2213Claude B. Krekeler6 patents · 441 citations
- 238Tyson J. Wilde12 patents · 427 citations
- 244Jonathan Marshall6 patents · 239 citations
- 251Stefan Wagner29 patents · 246 citations
Rising· last 2 yrs
The top-scoring E21C patents made public in the last 2 years
- 199US12031436B1✦ AIReal-time monitoring system and method for coal mine roof fractures during roadway tunneli5 cites · 202484% earned
- 296US12203374B1✦ AISystem for monitoring overlying roof rock and coal pillar of gob-side entry and method the4 cites · 202582% earned
- 392US12091973B1✦ AIGas mining cover arrangement5 cites · 202484% earned
- 488US12018534B1Drilling device for coal mining3 cites · 202480% earned
- 583US12066252B1Gas collection system4 cites · 202482% earned
- 679US12175599B1Method and system for three-dimensional (3D) imaging of underground goaf, and readable sto4 cites · 202482% earned
- 775US12044126B1Soil disrupting system3 cites · 202480% earned
- 871US11939034B1Deep-sea crawling robot and crawling method thereof3 cites · 202480% earned
- 967US12392230B1Method and system for multistage pulse hydraulic fracturing in directional long drilling o1 cites · 202567% earned
- 1063US11898446B1Tool retainer3 cites · 202472% earned
- 1158US12305514B2System for extracting water from lunar regolith and associated method1 cites · 202450% earned
- 1254US12186699B1Cryogen chamber with adsorber1 cites · 202567% earned
- 1350US12098638B1Method and system for coalbed permeability-enhancement induced by pressure-relief with min1 cites · 202467% earned
- 1446US12247487B2Debris clearing rover1 cites · 202556% earned
- 1542US11933002B1Rolling wedge cutter drum1 cites · 202467% earned
- 1638US11952897B1System for remotely operating a mine machine and related methods2 cites · 202476% earned
- 1733US12486766B2Milling machine and method for operating a milling machine0 cites · 20240% earned
- 1829US12385395B2Cutter head for mining machine0 cites · 20240% earned
- 1925US12391483B2Systems and methods for automated control of a beam stageloader bootend0 cites · 20240% earned
- 2021US12595733B2Rotary boring mining machine inertial steering system0 cites · 20240% earned
- 2117US11988072B1Projectile drilling system0 cites · 20240% earned
- 2213US12478980B1Particle repelling arrangement0 cites · 20250% earned
- 238US12264443B2Removing earth working method with a removing tool offset obliquely with respect to the pr0 cites · 20240% earned
- 244US12404769B1Heat recovery arrangement0 cites · 20250% earned
- 251US12492445B2Systems and methods for subsurface metal recovery0 cites · 20240% earned
Active· last 5 yrs
The top-scoring E21C patents of the last 5 years
- 199US11492891B1✦ AIMethod and apparatus of controlling drilling for rock burst prevention in coal mine roadwa45 cites · 202292% earned
- 296US11834940B1✦ AISystem and method of controlling single or dual pump operation11 cites · 202388% earned
- 392US11566521B2✦ AISystems and methods for radiant gas dynamic mining of permafrost15 cites · 202280% earned
- 488US11085669B2Optics and structure for space applications17 cites · 202178% earned
- 583US11619556B1Construction monitoring method and system for v-shaped column in underground foundation pi10 cites · 202387% earned
- 679US12031436B1Real-time monitoring system and method for coal mine roof fractures during roadway tunneli5 cites · 202484% earned
- 775US12203374B1System for monitoring overlying roof rock and coal pillar of gob-side entry and method the4 cites · 202582% earned
- 871US11492904B2Systems and methods for non-contact boring9 cites · 202274% earned
- 967US12091973B1Gas mining cover arrangement5 cites · 202484% earned
- 1063US11725513B2Systems and methods for radiant gas dynamic mining of permafrost for propellant extraction8 cites · 202276% earned
- 1158US12018534B1Drilling device for coal mining3 cites · 202480% earned
- 1254US11125084B1Mining method7 cites · 202179% earned
- 1350US12066252B1Gas collection system4 cites · 202482% earned
- 1446US11834949B2Collaborative erosion-control method of releasing-splitting-supporting based on coal mass 4 cites · 202382% earned
- 1542US12175599B1Method and system for three-dimensional (3D) imaging of underground goaf, and readable sto4 cites · 202482% earned
- 1638US11821317B1Coal or rock dynamic disaster warning apparatus and method4 cites · 202382% earned
- 1733US11002075B1Mine drilling system and related method9 cites · 202187% earned
- 1829US11585217B2Washerless cutting tool assembly6 cites · 202278% earned
- 1925US11719100B2System for extracting water from lunar regolith and associated method6 cites · 202178% earned
- 2021US11852016B2Rocket mining system, subsystems, components and methods6 cites · 202385% earned
- 2117US12044126B1Soil disrupting system3 cites · 202480% earned
- 2213US11719098B2Tool retainer5 cites · 202384% earned
- 238US11939034B1Deep-sea crawling robot and crawling method thereof3 cites · 202480% earned
- 244US12392230B1Method and system for multistage pulse hydraulic fracturing in directional long drilling o1 cites · 202567% earned
- 251US11738891B1Modular artificial-gravity orbital refinery spacecraft6 cites · 202385% earned
All-time canon
The defining E21C patents of the whole record
- 199US3954140A✦ AIRecovery of hydrocarbons by in situ thermal extraction419 cites · 197695% earned
- 296US4457374A✦ AITransient response process for detecting in situ retorting conditions353 cites · 198494% earned
- 392US4442896A✦ AITreatment of underground beds308 cites · 198494% earned
- 488US4201421AMining machine bit and mounting thereof285 cites · 198094% earned
- 583US4257650AMethod for recovering subsurface earth substances243 cites · 198194% earned
- 679US5896938APortable electrohydraulic mining drill240 cites · 199994% earned
- 775US4401163AModified in situ retorting of oil shale238 cites · 198394% earned
- 871US5417475ATool comprised of a holder body and a hard insert and method of using same238 cites · 199594% earned
- 967US4944559ATool for a mine working machine comprising a diamond-charged abrasive component235 cites · 199094% earned
- 1063US6113195ARotatable cutting bit and bit washer therefor232 cites · 200094% earned
- 1158US4437519AReduction of shale oil pour point229 cites · 198494% earned
- 1254US6371567B1Bit holders and bit blocks for road milling, mining and trenching equipment227 cites · 200289% earned
- 1350US6692083B2Replaceable wear surface for bit support227 cites · 200394% earned
- 1446US6341823B1Rotatable cutting tool with notched radial fins223 cites · 200294% earned
- 1542US6786557B2Protective wear sleeve having tapered lock and retainer222 cites · 200294% earned
- 1638US6196636B1Cutting bit insert configured in a polygonal pyramid shape and having a ring mounted in su221 cites · 200194% earned
- 1733US6824225B2Embossed washer221 cites · 200394% earned
- 1829US6685273B1Streamlining bit assemblies for road milling, mining and trenching equipment220 cites · 200485% earned
- 1925US5879057AHorizontal remote mining system, and method218 cites · 199994% earned
- 2021US6199956B1Round-shank bit for a coal cutting machine217 cites · 200194% earned
- 2117US6854810B2T-shaped cutter tool assembly with wear sleeve216 cites · 200291% earned
- 2213US6019434APoint attack bit216 cites · 200094% earned
- 238US4425967AIgnition procedure and process for in situ retorting of oil shale215 cites · 198494% earned
- 244US3950029AIn situ retorting of oil shale212 cites · 197694% earned
- 251US4489986AWear collar device for rotatable cutter bit211 cites · 198494% earned
Rising· last 2 yrs
Assignees whose newest E21C patents became public in the last 2 years — the current frontier
- 199SOLLAMI CO68 patents · 3,264 citations
- 296KENNAMETAL INC98 patents · 5,513 citations
- 392WIRTGEN GMBH119 patents · 796 citations
- 488HYPERSCIENCES INC10 patents · 43 citations
- 583JOY GLOBAL UNDERGROUND MINING LLC51 patents · 38 citations
- 679SANDVIK MINING & CONSTRUCTION OY19 patents · 51 citations
- 775CATERPILLAR PAVING PRODUCTS INC22 patents · 26 citations
- 871UNIV CHINA MINING57 patents · 35 citations
- 967UNIV SHANDONG SCIENCE & TECH13 patents · 21 citations
- 1063SALVINO CHRIS6 patents · 14 citations
- 1158UNIV CENTRAL FLORIDA RES FOUND INC5 patents · 9 citations
- 1254J H FLETCHER & CO3 patents · 18 citations
- 1350ORICA INT PTE LTD5 patents · 9 citations
- 1446HITACHI CONSTRUCTION MACH CO4 patents · 5 citations
- 1542QINGDAO INST MARINE GEOLOGY3 patents · 7 citations
- 1638UNIV TAIYUAN TECHNOLOGY11 patents · 4 citations
- 1733UNIV NORTHEASTERN4 patents · 8 citations
- 1829EPIROC ROCK DRILLS AB5 patents · 4 citations
- 1925UNIV SHANDONG2 patents · 8 citations
- 2021BEATON L CURTIS4 patents · 1 citations
- 2117UNIV HENAN POLYTECHNIC2 patents · 5 citations
- 2213UNIV CHINA GEOSCIENCES WUHAN2 patents · 4 citations
- 238LUNAR HELIUM 3 MINING LLC3 patents · 0 citations
- 244NOVAMERA INC2 patents · 1 citations
- 251ISPACE INC2 patents · 0 citations
Active· last 5 yrs
Sustained E21C output across the last 5 years
- 199SOLLAMI CO68 patents · 3,264 citations
- 296KENNAMETAL INC98 patents · 5,513 citations
- 392WIRTGEN GMBH119 patents · 796 citations
- 488SCHLUMBERGER TECHNOLOGY CORP28 patents · 620 citations
- 583SANDVIK INTELLECTUAL PROPERTY38 patents · 434 citations
- 679SOLLAMI PHILLIP18 patents · 415 citations
- 775CATERPILLAR INC33 patents · 261 citations
- 871US SYNTHETIC CORP21 patents · 138 citations
- 967TRANS ASTRONAUTICA CORP9 patents · 108 citations
- 1063KOMATSU MFG CO LTD25 patents · 184 citations
- 1158BETEK GMBH & CO KG19 patents · 63 citations
- 1254HYPERSCIENCES INC10 patents · 43 citations
- 1350JOY GLOBAL UNDERGROUND MINING LLC51 patents · 38 citations
- 1446MOSAIC CO5 patents · 34 citations
- 1542SANDVIK MINING & CONSTRUCTION OY19 patents · 51 citations
- 1638SUNCOR ENERGY INC5 patents · 30 citations
- 1733BOMAG GMBH13 patents · 44 citations
- 1829COMMW SCIENT IND RES ORG6 patents · 175 citations
- 1925CATERPILLAR PAVING PRODUCTS INC22 patents · 26 citations
- 2021UNIV CHINA MINING57 patents · 35 citations
- 2117HALLIBURTON ENERGY SERVICES INC7 patents · 24 citations
- 2213UNIV SHANDONG SCIENCE & TECH13 patents · 21 citations
- 238SALVINO CHRIS6 patents · 14 citations
- 244ELEMENT SIX GMBH8 patents · 24 citations
- 251UNIV CENTRAL FLORIDA RES FOUND INC5 patents · 9 citations
All-time canon
All-time PatentIndex Score in E21C
- 199VERMEER MFG CO14 patents · 821 citations
- 296SOLLAMI CO68 patents · 3,264 citations
- 392KENNAMETAL INC98 patents · 5,513 citations
- 488SANDVIK AB12 patents · 1,250 citations
- 583TETRA CORP7 patents · 602 citations
- 679JOY TECHNOLOGIES INC8 patents · 660 citations
- 775BETEK BERGBAU & HARTMETALL10 patents · 766 citations
- 871STOLAR INC8 patents · 686 citations
- 967FANSTEEL INC9 patents · 744 citations
- 1063CINCINNATI MINE MACHINERY CO8 patents · 591 citations
- 1158OCCIDENTAL OIL SHALE INC111 patents · 1,850 citations
- 1254STANDARD OIL CO INDIANA13 patents · 638 citations
- 1350WIRTGEN GMBH119 patents · 796 citations
- 1446JOY MM DELAWARE INC96 patents · 741 citations
- 1542KENNAMETAL PC INC7 patents · 439 citations
- 1638ESCO CORP9 patents · 469 citations
- 1733SCHLUMBERGER TECHNOLOGY CORP28 patents · 620 citations
- 1829SANDVIK INTELLECTUAL PROPERTY38 patents · 434 citations
- 1925US INTERIOR26 patents · 642 citations
- 2021US ENERGY10 patents · 304 citations
- 2117GULF OIL CORP8 patents · 449 citations
- 2213GTE PROD CORP8 patents · 348 citations
- 238GEWERK EISENHUETTE WESTFALIA107 patents · 1,162 citations
- 244VOEST ALPINE AG25 patents · 477 citations
- 251KEYSTONE ENGINEERING & MFG COR5 patents · 340 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth