Topic leaderboard
Refrigeration machines, heating & heat pumps
Ranked by the PatentIndex Score — a 1–99 percentile within F25B · public-visibility date · generated 2026
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest F25B patents became public in the last 2 years — the current frontier
- 199Rajiv R. Singh44 patents · 1,217 citations
- 296Robert P. Scaringe44 patents · 1,480 citations
- 392Hang T. Pham27 patents · 738 citations
- 488Clayton Alexander46 patents · 895 citations
- 583Kyle B. Van Meter42 patents · 549 citations
- 679Barbara Haviland Minor68 patents · 725 citations
- 775Jon P. Hartfield21 patents · 737 citations
- 871Michael F. Taras141 patents · 2,731 citations
- 967Jonathan D. Douglas18 patents · 596 citations
- 1063Mario Joseph Nappa44 patents · 341 citations
- 1158Alp Ilercil22 patents · 419 citations
- 1254Christopher Thomas Wakeham36 patents · 314 citations
- 1350Daren John Leith36 patents · 314 citations
- 1446Mikko Juhani Timperi36 patents · 314 citations
- 1542Ian Shankland18 patents · 325 citations
- 1638Wissam Rached42 patents · 767 citations
- 1733Christian Muller34 patents · 647 citations
- 1829Peter Maier-Laxhuber35 patents · 993 citations
- 1925Igor Vaisman57 patents · 531 citations
- 2021Akitoshi Ueno18 patents · 321 citations
- 2117Masao Akei8 patents · 176 citations
- 2213Vitalij K. Pecharsky9 patents · 293 citations
- 238Gregory S. Derosier11 patents · 307 citations
- 244Michael A. Stark21 patents · 391 citations
- 251John T. Knight18 patents · 267 citations
Active· last 5 yrs
Sustained F25B output across the last 5 years
- 199Roy D. Kornbluh18 patents · 4,035 citations
- 296Qibing Pei15 patents · 1,514 citations
- 392Hung M. Pham106 patents · 5,568 citations
- 488Lon E. Bell42 patents · 3,804 citations
- 583Terry Zeigler22 patents · 1,120 citations
- 679Rajiv R. Singh44 patents · 1,217 citations
- 775Robert P. Scaringe44 patents · 1,480 citations
- 871Hang T. Pham27 patents · 738 citations
- 967Clayton Alexander46 patents · 895 citations
- 1063Kyle B. Van Meter42 patents · 549 citations
- 1158Barbara Haviland Minor68 patents · 725 citations
- 1254John A. Barclay23 patents · 1,181 citations
- 1350Satoshi Itoh27 patents · 1,099 citations
- 1446Richard G. Lord29 patents · 1,033 citations
- 1542Uwe Rockenfeller77 patents · 2,021 citations
- 1638Jon P. Hartfield21 patents · 737 citations
- 1733Kenneth W. Cowans33 patents · 775 citations
- 1829Michael F. Taras141 patents · 2,731 citations
- 1925Ralph C. Longsworth60 patents · 1,360 citations
- 2021Jonathan D. Douglas18 patents · 596 citations
- 2117Jason Hugenroth10 patents · 469 citations
- 2213Lee L. Sibik25 patents · 630 citations
- 238Velliyur Nott Mallikarjuna Rao19 patents · 218 citations
- 244Mario Joseph Nappa44 patents · 341 citations
- 251Akiko Saito20 patents · 511 citations
All-time canon
Career PatentIndex Score in F25B
- 199Ronald E. Pelrine18 patents · 4,063 citations
- 296Roy D. Kornbluh18 patents · 4,035 citations
- 392Lawrence Kates21 patents · 1,064 citations
- 488Qibing Pei15 patents · 1,514 citations
- 583Mark Bass20 patents · 1,689 citations
- 679Hung M. Pham106 patents · 5,568 citations
- 775Lon E. Bell42 patents · 3,804 citations
- 871Abtar Singh48 patents · 3,188 citations
- 967Jean-Luc M. Caillat37 patents · 2,513 citations
- 1063Nagaraj Jayanth41 patents · 2,465 citations
- 1158Robert S. Wegeng6 patents · 1,613 citations
- 1254Joseph S. Eckerle7 patents · 1,257 citations
- 1350Thomas Mathews18 patents · 1,571 citations
- 1446Terry Zeigler22 patents · 1,120 citations
- 1542Tony Quisenberry18 patents · 1,731 citations
- 1638Hank Millet14 patents · 1,962 citations
- 1733Paul Wickberg18 patents · 1,229 citations
- 1829Neal Starling11 patents · 1,147 citations
- 1925Vijay Bahel20 patents · 1,938 citations
- 2021Mickey Hickey13 patents · 1,768 citations
- 2117Gregory P. Herroon12 patents · 1,697 citations
- 2213David M. Erdman20 patents · 2,527 citations
- 238Graham Walker7 patents · 774 citations
- 244Charles C. Hill5 patents · 750 citations
- 251Scott C. Honkonen5 patents · 750 citations
Rising· last 2 yrs
The top-scoring F25B patents made public in the last 2 years
- 199US11879565B1✦ AIMethod and apparatus for valve core installation/removal9 cites · 202481% earned
- 296US11952945B2✦ AIThermal management system for an aircraft5 cites · 202484% earned
- 392US12363865B2✦ AIRegenerative preheater for phase change cooling applications4 cites · 202475% earned
- 488US12325282B2Thermal management system for vehicle4 cites · 202482% earned
- 583US11990598B1Heat activated multiphase fluid-operated pump for battery temperature control6 cites · 202467% earned
- 679US12179556B2Heat pump for a vehicle2 cites · 202467% earned
- 775US12196476B2Refrigerator and control method thereof2 cites · 202467% earned
- 871US12398939B1Portable container1 cites · 202556% earned
- 967US11946679B1Exhaust gas heat recovery from cryo-compression engines with cogeneration of cryo-working 3 cites · 202480% earned
- 1063US11982230B2Thermal management system for an aircraft3 cites · 202480% earned
- 1158US12313304B2Managing charge allocation and optimizing multi-mode performance of air-source integrated 3 cites · 202480% earned
- 1254US12152816B1Apparatus and method of liquefied gas electrolyte preparation2 cites · 202476% earned
- 1350US12405032B1Optimal operation control method of air-source heat pump and gas-fired heater combined hea1 cites · 202567% earned
- 1446US12215899B1Thermoelectric dehumidifier2 cites · 202576% earned
- 1542US12320354B1Compression device having integrated discharge chamber(s) and compressor with compression 2 cites · 202576% earned
- 1638US12145425B2Heat pump system for vehicle3 cites · 202480% earned
- 1733US11988418B2Vapor compression cycle with direct pumped two-phase cooling3 cites · 202480% earned
- 1829US12508873B2Heat pump system of vehicle2 cites · 202476% earned
- 1925US12370866B2Heat pump system for vehicle2 cites · 202476% earned
- 2021US12228120B2Linear compressor2 cites · 202476% earned
- 2117US12235054B2Integrated connector and heat exchanger including the same2 cites · 202476% earned
- 2213US12305905B2Refrigerated portable room system2 cites · 202576% earned
- 238US12253272B1Systems and methods for controlling indoor humidity4 cites · 202575% earned
- 244US12485730B2Technologies for manifolds1 cites · 202450% earned
- 251US12449121B1Air source heat pump system and method of use for industrial steam generation1 cites · 202550% earned
Active· last 5 yrs
The top-scoring F25B patents of the last 5 years
- 199US11187241B1✦ AIPortable blowing device25 cites · 202190% earned
- 296US11668508B2✦ AIPortable cooler21 cites · 202278% earned
- 392US11560042B2✦ AIHeat pump refrigerant loop arrangements19 cites · 202285% earned
- 488US11125479B1Apparatus and process for amateur HVAC installation19 cites · 202185% earned
- 583US11112155B1Thermal management systems26 cites · 202176% earned
- 679US11131471B1Refrigeration leak detection22 cites · 202182% earned
- 775US11627747B2Providing single servings of cooled foods and drinks13 cites · 202373% earned
- 871US11879565B1Method and apparatus for valve core installation/removal9 cites · 202481% earned
- 967US11231118B1Integrated one way valve15 cites · 202289% earned
- 1063US11046877B1Compositions comprising fluoroolefins and uses thereof14 cites · 202167% earned
- 1158US11479077B2Heat pump system for vehicle14 cites · 202289% earned
- 1254US11566823B1Heat exchanger systems11 cites · 202388% earned
- 1350US11479076B2Heat pump system for vehicle13 cites · 202288% earned
- 1446US11654744B2Thermal management system for vehicle13 cites · 202288% earned
- 1542US11761644B1Cooling and desalination system10 cites · 202387% earned
- 1638US11549612B1Valve core removal tool fixture with slide valve10 cites · 202387% earned
- 1733US11737240B1Heat-activated multiphase fluid-operated pump for electronics waste heat removal12 cites · 202372% earned
- 1829US11698210B1Thermal management systems12 cites · 202382% earned
- 1925US11561033B1Thermal management systems14 cites · 202380% earned
- 2021US11441803B2HVAC system and method of circulating flammable refrigerant11 cites · 202182% earned
- 2117US11624542B2Refrigerator11 cites · 202182% earned
- 2213US11870045B2Thermal management system for vehicle11 cites · 202288% earned
- 238US11857004B2Heating and cooling technologies11 cites · 202288% earned
- 244US11293659B2Detection of a reversing valve fault13 cites · 202183% earned
- 251US11629890B1Thermal management systems12 cites · 202382% earned
All-time canon
The defining F25B patents of the whole record
- 199US6545384B1✦ AIElectroactive polymer devices1,768 cites · 200396% earned
- 296US4169990A✦ AIElectronically commutated motor1,603 cites · 197996% earned
- 392US6453687B2✦ AIRefrigeration monitor unit1,013 cites · 200293% earned
- 488US4459519AElectronically commutated motor systems and control therefor854 cites · 198495% earned
- 583US5774053AStorage device for the delivery and pickup of goods619 cites · 199895% earned
- 679US6359270B1Communications module mounting for domestic appliance557 cites · 200290% earned
- 775US5097829ATemperature controlled cooling system553 cites · 199295% earned
- 871US5811062AMicrocomponent chemical process sheet architecture539 cites · 199895% earned
- 967US6204763B1Household consumable item automatic replenishment system including intelligent refrigerato534 cites · 200195% earned
- 1063US5731954ACooling system for computer503 cites · 199895% earned
- 1158US6684659B1Refrigerator and defrosting heater469 cites · 200495% earned
- 1254US5520682ACryosurgical instrument with vent means and method using same463 cites · 199695% earned
- 1350US5537822ACompressed air energy storage method and system449 cites · 199695% earned
- 1446US6019165AHeat exchange apparatus434 cites · 200095% earned
- 1542US6002450ATwo-way remote control with advertising display427 cites · 199995% earned
- 1638US5275595ACryosurgical instrument397 cites · 199495% earned
- 1733US6121593AHome appliances provided with control systems which may be actuated from a remote location385 cites · 200095% earned
- 1829US5276630ASelf configuring controller382 cites · 199494% earned
- 1925US6812624B1Electroactive polymers373 cites · 200483% earned
- 2021US5084671AElectric probing-test machine having a cooling system372 cites · 199294% earned
- 2117US5000000AEthanol production by Escherichia coli strains co-expressing Zymomonas PDC and ADH genes368 cites · 199194% earned
- 2213US5586438APortable device for preserving organs by static storage or perfusion368 cites · 199694% earned
- 238US5626021AVariable temperature seat climate control system356 cites · 199794% earned
- 244US4483341ATherapeutic hypothermia instrument349 cites · 198494% earned
- 251US6768246B2Biologically powered electroactive polymer generators348 cites · 200194% earned
Rising· last 2 yrs
Assignees whose newest F25B patents became public in the last 2 years — the current frontier
- 199GEN ELECTRIC313 patents · 13,452 citations
- 296CARRIER CORP1,082 patents · 21,052 citations
- 392WHIRLPOOL CO305 patents · 6,052 citations
- 488HONEYWELL INT INC106 patents · 1,689 citations
- 583IBM123 patents · 4,617 citations
- 679HITACHI LTD269 patents · 9,075 citations
- 775DENSO CORP531 patents · 8,595 citations
- 871SAMSUNG ELECTRONICS CO LTD382 patents · 5,261 citations
- 967LG ELECTRONICS INC1,008 patents · 5,481 citations
- 1063EMERSON ELECTRIC CO61 patents · 1,836 citations
- 1158MITSUBISHI ELECTRIC CORP907 patents · 5,934 citations
- 1254EMBER TECH INC32 patents · 474 citations
- 1350SANDEN CORP112 patents · 2,589 citations
- 1446LENNOX IND INC249 patents · 1,302 citations
- 1542DANFOSS AS162 patents · 1,537 citations
- 1638US NAVY26 patents · 909 citations
- 1733NASA35 patents · 1,076 citations
- 1829MITSUBISHI HEAVY IND LTD64 patents · 1,049 citations
- 1925MASSACHUSETTS INST TECHNOLOGY15 patents · 504 citations
- 2021DAIKIN IND LTD787 patents · 3,848 citations
- 2117GENTHERM INC34 patents · 617 citations
- 2213PARKER HANNIFIN CORP86 patents · 1,505 citations
- 238HAMILTON SUNDSTRAND CORP118 patents · 575 citations
- 244UT BATTELLE LLC19 patents · 394 citations
- 251BOEING CO39 patents · 406 citations
Active· last 5 yrs
Sustained F25B output across the last 5 years
- 199GEN ELECTRIC313 patents · 13,452 citations
- 296BATTELLE MEMORIAL INSTITUTE20 patents · 2,044 citations
- 392CARRIER CORP1,082 patents · 21,052 citations
- 488WHIRLPOOL CO305 patents · 6,052 citations
- 583EMERSON CLIMATE TECHNOLOGIES219 patents · 2,378 citations
- 679BERGSTROM INC20 patents · 621 citations
- 775HEWLETT PACKARD DEVELOPMENT CO29 patents · 1,468 citations
- 871HONEYWELL INT INC106 patents · 1,689 citations
- 967THERMO KING CORP180 patents · 5,904 citations
- 1063IBM123 patents · 4,617 citations
- 1158HUSSMANN CORP67 patents · 2,788 citations
- 1254HITACHI LTD269 patents · 9,075 citations
- 1350DENSO CORP531 patents · 8,595 citations
- 1446UNITED TECHNOLOGIES CORP39 patents · 1,879 citations
- 1542SAMSUNG ELECTRONICS CO LTD382 patents · 5,261 citations
- 1638LG ELECTRONICS INC1,008 patents · 5,481 citations
- 1733TOSHIBA KK250 patents · 8,557 citations
- 1829EMERSON ELECTRIC CO61 patents · 1,836 citations
- 1925ROCKY RESEARCH71 patents · 2,131 citations
- 2021MODINE MFG CO45 patents · 1,681 citations
- 2117INTEL CORP30 patents · 921 citations
- 2213MITSUBISHI ELECTRIC CORP907 patents · 5,934 citations
- 238TOKYO ELECTRON LTD24 patents · 821 citations
- 244EMBER TECH INC32 patents · 474 citations
- 251SANDEN CORP112 patents · 2,589 citations
All-time canon
All-time PatentIndex Score in F25B
- 199STANFORD RES INST INT18 patents · 4,055 citations
- 296GEN ELECTRIC313 patents · 13,452 citations
- 392COPELAND CORP71 patents · 7,442 citations
- 488KATES LAWRENCE11 patents · 1,009 citations
- 583AMERIGON INC7 patents · 1,637 citations
- 679BATTELLE MEMORIAL INSTITUTE20 patents · 2,044 citations
- 775BSST LLC24 patents · 2,446 citations
- 871CARRIER CORP1,082 patents · 21,052 citations
- 967WHIRLPOOL CO305 patents · 6,052 citations
- 1063EMERSON RETAIL SERVICES INC21 patents · 1,798 citations
- 1158EMERSON CLIMATE TECHNOLOGIES219 patents · 2,378 citations
- 1254BERGSTROM INC20 patents · 621 citations
- 1350HEWLETT PACKARD DEVELOPMENT CO29 patents · 1,468 citations
- 1446AMERICAN STANDARD INC105 patents · 5,818 citations
- 1542HONEYWELL INT INC106 patents · 1,689 citations
- 1638HONEYWELL INC41 patents · 3,067 citations
- 1733BORG WARNER50 patents · 2,805 citations
- 1829THERMO KING CORP180 patents · 5,904 citations
- 1925MARLOW IND INC19 patents · 1,619 citations
- 2021IBM123 patents · 4,617 citations
- 2117HUSSMANN CORP67 patents · 2,788 citations
- 2213HITACHI LTD269 patents · 9,075 citations
- 238DENSO CORP531 patents · 8,595 citations
- 244THERMOTEK INC13 patents · 815 citations
- 251UNITED TECHNOLOGIES CORP39 patents · 1,879 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth