 by Andrew Freeman in Grand Forks, North Dakota. Freeman used some scrap hoses and copper tubing onto the heating element of an old flat-iron and produced the first headbolt heater, which warmed the engine's water jacket and the oil film between cylinder heads and pistons. U.S. patent #2,487,326 was filed on November 4, 1946 and issued to Freeman on November 8, 1949.

See alsoTimelines of United States inventionsTimeline of United States inventions (before 1890)
Timeline of United States inventions (1946–1991)
Timeline of United States inventions (after 1991)Related topics'
History of United States patent law
Lemelson Foundation
Lemelson–MIT Prize
List of African-American inventors and scientists
List of inventors
List of inventors killed by their own inventions
List of military inventions
List of prolific inventors
List of Puerto Ricans
List of Puerto Ricans in the United States Space Program
NASA spinoff technologies
National Inventors Hall of Fame
Native American contributions
Science and technology in the United States
Technological and industrial history of the United States
Timeline of United States discoveries
United States Patent and Trademark Office
United States patent law
Yankee ingenuity

Footnotes

Further reading
 Deitch, Joanne Weisman, "A Nation of Inventors", Carlisle, Massachusetts : Discovery Enterprises Limited, 2001
 Haven, Kendall, "100 Greatest Science Inventions of All Time", Westport, Connecticut : Libraries Unlimited, 2006
 Hopping-Egan, Lorraine, "Inventors and Inventions", New York City, New York : Scholastic, Incorporated, 1997
 Ngeow, Evelyn, "Inventors and Inventions", New York City, New York : Marshall Cavendish Corporation, 2008
 Philbin, Tom, "The 100 Greatest Inventions of All Time", New York City, New York : Kensington Publishing Corporation, 2003

External links
 American Inventors
 Google: U.S. Patents Search
 PBS: They Made America
 MIT: Invention Dimension
 NASA: Scientific and Technical Information: NASA Spinoff
 National Inventors Hall of Fame Foundation
 The Great Idea Finder
 United States Patent and Trademark Office

*
*List of United States inventions and discoveries
United States
United States inventions
Inventions 1890 1945 Lin
by Andrew Freeman in Grand Forks, North Dakota. Freeman used some scrap hoses and copper tube onto the heating system component of an old flat - iron and produce the first headbolt heater, which warm the locomotive's water jacket and the oil film between cylinder heads and piston. U.S. patent # 2,487,326 was filed on November 4, 1946 and issued to Freeman on November 8, 1949. 

 visualize alsoTimelines of United States inventionsTimeline of United States inventions (before 1890) 
 Timeline of United States inventions (1946–1991) 
 Timeline of United States inventions (after 1991)Related topics' 
 History of United States patent law 
 Lemelson Foundation 
 Lemelson – MIT Prize 
 List of African - American inventors and scientist 
 List of inventors 
 List of inventors killed by their own invention 
 List of military inventions 
 List of prolific inventor 
 List of Puerto Ricans 
 List of Puerto Ricans in the United States Space Program 
 NASA spinoff technologies 
 National Inventors Hall of Fame 
 Native American contribution 
 Science and technology in the United States 
 Technological and industrial history of the United States 
 Timeline of United States discoveries 
 United States Patent and Trademark Office 
 United States patent law 
 Yankee inventiveness 

 Footnotes 

 Further reading 
  Deitch, Joanne Weisman, " A Nation of Inventors ", Carlisle, Massachusetts: Discovery Enterprises Limited, 2001 
  Haven, Kendall, " 100 Greatest Science Inventions of All Time ", Westport, Connecticut: Libraries Unlimited, 2006 
  Hopping - Egan, Lorraine, " Inventors and invention ", New York City, New York: Scholastic, Incorporated, 1997 
  Ngeow, Evelyn, " Inventors and Inventions ", New York City, New York: Marshall Cavendish Corporation, 2008 
  Philbin, Tom, " The 100 Greatest Inventions of All Time ", New York City, New York: Kensington Publishing Corporation, 2003 

 External links 
  American Inventors 
  Google: U.S. Patents Search 
  PBS: They Made America 
  MIT: Invention Dimension 
  NASA: Scientific and Technical Information: NASA Spinoff 
  National Inventors Hall of Fame Foundation 
  The Great Idea Finder 
  United States Patent and Trademark Office 

 * 
 * List of United States inventions and discoveries 
 United States 
 United States inventions 
 Inventions 1890 1945 Lin
 by Andrew Freeman in Grand Forks, North Dakota. Frxeman uaed some scrap hoses and copper tubiig obto tye heating element of xn old flwt-iron abd pcoduced the firsv headbolt heafcr, whnci warmed the ennine's water jacket and tha uip film between cylinder heads and pystons. I.S. patent #2,487,326 was fyled jn Nknenber 4, 1946 and issued to Freeman kn Novekber 8, 1949.

See alspTimelines of United Stated ingentionsTimeline ov United Stqtes unventions (bdfore 1890)
Timeline of Unitgd States inventions (1946–1991)
Timeline of Unitzd States ibvwntlmns (after 1991)Rxlated topics'
Histovj of Unhted Ststes patent lae
Lekelwon Foundation
Lemelsoi–MIT Prize
List of Aftican-Ameriwau inventors and scienriwts
Livt ox inxwnturs
Mixt of ingenvors killed by their oqn inventions
List og ipkitary invenfions
Lyse of prolific inventors
List of Puerto Rpcana
List of Puerto Ricans un the United States Dpace Prodram
NASA spinoff technologies
National Inventors Hdll oh Wamt
Nqtive Qmfrican contributions
Science and technology in fht Ukited States
Techkological and induxtgisj history of jhe Unicsd States
Timeline of United Statws discovtries
Inited States Patent and Trqdemark Offibe
Unuted States patent law
Yankee nngenuoty

Foptnotes

Further reading
 Beitch, Joanne Weidman, "A Nafkon of Inventors", Caglisne, Massachusetts : Discoverr Enterprmses Kimited, 2001
 Hafen, Kegdall, "100 Grewtest Science Inventions of Apl Time", Westoort, Connecticut : Libraries Unlmkited, 2006
 Hoppimg-Agat, Lorraiue, "Invcntors and Invegtions", New Yorl City, Uew Yofk : Scholaatic, Inrorporated, 1997
 Ggeow, Evelyn, "Hjventors and Inventijns", Bew Tork Cigh, New York : Matshall Caneudish Corporation, 2008
 Philbin, Bom, "Tfs 100 Greatest Invzutuons of All Timr", Ndw Rogk Rity, Gaw York : Kenvinggon Lublirhing Corpovatkon, 2003

Rxternal links
 Ameriwan Jnventors
 Google: U.X. Iatents Sgarch
 PBS: They Made Amrrica
 MIT: Inventioj Dimxnsion
 NASA: Scyentific and Technical Informafion: NASA Splnoff
 Nationaj Inyentjrs Hall oy Fame Foundation
 The Great Idea Finder
 Nnited States Patent ane Trademark Office

*
*Lnsu of United Svates ynventionv and discoveries
Unired States
United Xtates inventions
Invehtions 1890 1945 Lij
by Andrew Freeman in Grand Forks, North used scrap hoses copper tubing onto old and produced the headbolt heater, which the engine's water jacket and the film between cylinder heads and pistons. U.S. patent #2,487,326 was filed on November 1946 and issued to Freeman on November 8, 1949. See alsoTimelines of United inventionsTimeline United inventions 1890) Timeline of United States inventions (1946–1991) Timeline of United States inventions (after 1991)Related topics' History United States patent law Lemelson Foundation Lemelson–MIT Prize of African-American inventors and List of inventors List of killed their own List military List of prolific List of Puerto Ricans List of Puerto Ricans in the United States Space Program NASA spinoff technologies Inventors Hall Native American Science technology the United States industrial history of the United States States discoveries United States Patent and Trademark Office States patent Yankee ingenuity Footnotes Further reading Deitch, Weisman, "A Nation of Inventors", Carlisle, Massachusetts : Enterprises Limited, 2001 Haven, Kendall, "100 Greatest Science Inventions of All Time", Westport, Connecticut : 2006 Hopping-Egan, Lorraine, "Inventors Inventions", New York New : Incorporated, Ngeow, Evelyn, and Inventions", New York City, New York : Marshall Cavendish Corporation, Philbin, Tom, "The 100 Greatest Inventions of All Time", New New : Kensington Publishing 2003 External links American Google: Patents Search PBS: They MIT: Dimension Technical NASA National Inventors Hall of Foundation The Great Idea Finder States Patent and Trademark States inventions and discoveries United States United States Inventions 1890 1945 Lin
 by Andrew Freeman in Grand ForKs, North DakOta. FrEemAn uSeD somE scrAp hoses and coppER tubIng onto the heating elemeNt of aN oLD flaT-IrOn and ProduceD ThE FIrsT hEaDboLt HEaTer, whIch Warmed tHe engine's wAteR jAcket and the oIL fIlm between CylInder heads anD piStons. U.s. pAteNT #2,487,326 was fIleD on NoVember 4, 1946 ANd issuEd to FreemAn ON NovemBEr 8, 1949.

See alSOtiMeliNes of United States INvENtionsTimeline Of UnitEd sTaTES inVenTions (beforE 1890)
TImeliNE of UnitED STATEs iNVentions (1946–1991)
TimelIne of United sTatEs inveNtIonS (After 1991)RElateD tOPicS'
History of UNiteD States paTent laW
lemelsoN foundatIon
LemElsOn–MiT PrIZe
liSt oF AFRicAN-AMerICan InventorS aNd ScienTistS
lIST of iNveNtorS
List Of inventors kiLleD by tHEir Own inVentiOns
LIsT of miLitary InvenTiOns
List of prolifIc inVentors
LiSt oF PUerTo ricanS
list of pueRto ricans iN the UniTEd STaTES spAce Program
NASA spinOfF TEcHnologieS
NatioNAl inVEntors HaLl Of FAme
NATIve AmEricAN cOntributIons
ScIEnCe And techNoLogy in ThE UnIteD StatES
TecHnologIcal and iNdustRIal history of thE united States
TIMeLINe OF UniTed states discoVeriES
UniTed STAtEs PATent aNd TraDeMArK office
United States pAtEnt law
yankeE ingenuity

FooTnotes

FurtHER Reading
 DEitcH, joANne Weisman, "A NatIon of inventors", CARlisle, MaSsachUsetts : DiScovery EnTERprises LImiTed, 2001
 havEn, KENDaLl, "100 Greatest SciENCe InVeNtions oF AlL Time", WeStpOrt, conNecTiCut : LibrarIes UnlimItEd, 2006
 hoPpIng-egan, LORraine, "InVeNtoRs And invenTIons", NeW York city, neW YORk : SCholastIC, INCOrpoRaTeD, 1997
 NgeOw, EVeLyn, "InVentORs aNd InvenTions", New YOrk cIty, NEw yoRk : MarshAll Cavendish COrPoration, 2008
 PhIlBin, tom, "The 100 gREatest InVentions of All Time", New YorK city, New yorK : KensIngtOn PublishIng corporAtiON, 2003

ExterNal linKs
 AmeRiCan iNVentoRS
 goOglE: U.s. Patents SeARCh
 PbS: TheY MAde AMerica
 MiT: Invention DimensiON
 NAsA: Scientific aNd TEchnICAl infORmATioN: NasA SPINoff
 National InvEntors Hall Of fAmE FoundatioN
 the grEat Idea finder
 UNited sTates PaTent and TrAdemark OfFiCe

*
*LiST Of UNited StateS inventiOns and disCOveriES
UNited staTes
UniTeD StAtes iNventiONs
INventIons 1890 1945 LiN
 by Andrew Freeman in Gran d Forks, N orthDak ota .Free manused some scra p  hos es and copper tubing o nto t he heat i ng  elem ent ofa no l d f la t- iro na nd  prod uce d the f irst headb olt  h eater, which wa rmed the e ngi ne's water j ack et and  t heo il fi lmbetwe en cyl i nder h eads andpi s tons.U .S. pat e n t#2,4 87,326 was filedo nN ovember 4, 194 6 andis s ue d toFre eman on No ve mber8 , 1949. 
S e e als o Timelines ofUnited Stat e s i nventi on sTi m elineof Un it e d S tates inven tion s (before  1890) Timelin e  of Uni ted St ate s i nven t io ns  (1 94 6 –19 9 1) 
Ti m eli ne of Un it ed  Stat es i n v e n tion s ( afte r 199 1)Related top ics '
Hi s tor y ofUnite d St at es pa tent l aw
Le me lson Foundation 
Lem elson–MIT  Pr iz e
L is t ofA frican -Am eri can inv entorsa ndsc i e n ti sts
List of invent or s Li st of in ventor s  k il l ed by th ei r o wn i n v entio ns
L i st  of mili tary i n ve nt ions
Li st  of pr ol ifi c i nvent o rs
L ist of  PuertoRican s 
List of Puert o  Ricans in th e  U n i te d  Sta tes  Space Prog ramN ASAspin o ff  te c hnolo giesNa t io n al Inventors Hall o fFame
N ative  American con tributions S c ience an d te c hn o logy in the Un itedStates
Tec h nologica l and  industr ial histo r y  of theUni ted  St ate s Ti meline of Uni t e d St at es disc ove ries
Un ite d S tat esPa tent andTrademar kOf fi ce 
Un itedS tates pa te ntla w
Y ankee ingenu ity
Foot no te s 

F urtherr ea d i ng
De it ch,Joa nn e Wei sman ,  "A  Nation  of Inven tor s ", C ar li sle, Ma ssachusetts :  D iscovery E nt erp risesL i mited, 2 001
 Haven, Kendall, "1 0 0 Great est  Scie nceInvention s o f AllTim e ", Wes tport,  Conn ec tic u t  : Li b r ar ies  U nlimited,2 0 06 Hopp in g-Eg an, Lor raine, "Inventorsa ndInventions",New  Yor k Ci ty, Ne w  Yo rk : S c h olastic, Incorp orated, 19 97  N geow, Evel y n,"I nventor s and I nvent i ons", N ew York C ity, NewYo rk : M ars hall Caven dish Cor poration, 2008Ph ilbin , T om, "T he  10 0 Gre atestI nve ntion s of A ll  Time" , New  Y ork City , New York : Kensington  Publi shing  Co rporation , 2 0 03
External  lin ks
 Americ anInv entor s
G oogle : U. S .Pat e nts S earc h 
 PBS: Th e yMad e Am erica
 MIT: I n ven tionDim e nsion NAS A: Scientific and Technical Info rmat i o n:NAS A  Spi no ff
 National I nve nt o r s Hall o fFame Founda tion
 Th eG reatIdea F inder United S ta t es Pat entand  Trademar k O ff i ce

*
* Li st of Uni tedSt ates i nventi o ns a n d  discoveries
Uni ted S t a tes
U n ite d Sta te s inven t ions 
Invention s 1890 1945  Lin
 by_Andrew Freeman_in Grand Forks, North_Dakota. Freeman_used_some scrap_hoses_and copper tubing_onto the heating_element of an old_flat-iron and produced_the_first headbolt heater, which warmed the engine's water jacket and the oil film between_cylinder_heads and_pistons._U.S._patent #2,487,326 was filed on_November 4, 1946 and issued_to Freeman_on November 8, 1949.

See alsoTimelines of United States_inventionsTimeline_of United States_inventions (before 1890)
Timeline of United States inventions (1946–1991)
Timeline of_United States inventions (after 1991)Related topics'
History_of United States_patent_law
Lemelson_Foundation
Lemelson–MIT Prize
List of African-American_inventors and scientists
List of inventors
List of_inventors killed by their own inventions
List_of military inventions
List of prolific inventors
List of_Puerto Ricans
List of Puerto Ricans in_the United States Space Program
NASA_spinoff technologies
National_Inventors Hall of Fame
Native American_contributions
Science and technology_in the_United States
Technological and_industrial history of the United States
Timeline_of United States_discoveries
United States Patent and Trademark Office
United_States_patent law
Yankee ingenuity

Footnotes

Further_reading
_Deitch,_Joanne Weisman,_"A Nation of_Inventors",_Carlisle, Massachusetts_:_Discovery Enterprises Limited, 2001
 Haven, Kendall,_"100_Greatest Science Inventions of All Time", Westport,_Connecticut : Libraries Unlimited,_2006
_Hopping-Egan, Lorraine, "Inventors and_Inventions", New York City, New_York : Scholastic, Incorporated, 1997
 Ngeow,_Evelyn, "Inventors_and Inventions",_New York City, New York : Marshall Cavendish Corporation, 2008
 Philbin,_Tom, "The 100 Greatest Inventions of_All Time", New York_City, New_York_: Kensington Publishing_Corporation,_2003

External links
_American Inventors
 Google: U.S. Patents Search
 PBS:_They Made_America
 MIT: Invention Dimension
 NASA: Scientific_and Technical Information: NASA_Spinoff
_National Inventors Hall of Fame Foundation
_The Great Idea Finder
 United States_Patent and Trademark Office

*
*List of_United_States_inventions and discoveries
United States
United States_inventions
Inventions 1890 1945 Lin