 is a bow tie or four-in-hand tie which is permanently tied, with a dimple just below the knot, and which is fixed to the front of the shirt collar by a metal clip. Alternately, the tie may have a band around the neck fastened with a hook and eye. The clip-on tie was reportedly invented on December 13, 1928 in Clinton, Iowa, USA. The name of the inventor remains unknown.1928 Electric razor The electric razor has a rotating, vibrating or oscillating blade to remove unwanted hair. The electric razor does not require the use of shaving cream, soap, or water. The razor is powered by a small DC motor, and usually has rechargeable batteries, though early ones were powered directly by house current. The electric razor was invented in 1928 by Col. Jacob Schick.1928 Iron lung An iron lung is a large machine that enables a person to breathe when normal muscle control has been lost or the work of breathing exceeds the person's ability. It is a form of a medical ventilator. Philip Drinker invented the iron lung while working at Harvard University in 1928.

Great Depression and World War II (1929–1945)1929 Freon Freon is an odorless, colorless, nonflammable, and noncorrosive chlorofluorocarbon and hydrochlorofluorocarbon refrigerant, which is used in air conditioning, refrigeration and some automatic fire-fighting systems. Refrigerators from the late 19th century until 1929 used toxic gases, ammonia, methyl chloride, and sulfur dioxide as refrigerants. This new "miracle compound" was co-invented in 1929 by Charles Midgley Jr. and Charles Kettering.1929 Tampon (applicator) A tampon is a mass of absorbent material into a body cavity or wound to absorb bodily fluid. The most common type in daily use is disposable and designed to be inserted into the vagina during menstruation to absorb the flow of blood. The ancient Egyptians first invented disposable tampons made of softened papyrus around 2500 B.C. The ancient Greeks followed this with tampons made from lint wrapped around a small piece of wood. But it was not until 1929 that Earle Haas of Denver, Colorado first invented the modern tampon with an applicator. Dr. Haas submitted the design for patent in 1931, and in 1936, the tampon was first sold in the United States. He later gave his invention the brandname T
is a bow tie or four - in - hand tie which is permanently tied, with a dimpled chad barely below the knot, and which is fixed to the presence of the shirt apprehension by a metal clip. Alternately, the draw may give birth a band around the neck fastened with a hook and eye. The time - on tie was reportedly invented on December 13, 1928 in Clinton, Iowa, USA. The name of the inventor stay unknown.1928 Electric razor The electric razor experience a rotating, vibrating or oscillating sword to remove unwanted hair. The electric razor does not ask the use of shaving cream, soap, or body of water. The razor is powered by a minor DC motor, and usually has rechargeable batteries, though early ones were powered immediately by house current. The electric razor was invented in 1928 by Col. Jacob Schick.1928 Iron lung An iron lung is a large machine that enables a person to rest when normal muscle control has been lost or the work of breathing exceeds the person's ability. It is a form of a medical ventilator. Philip Drinker invented the iron lung while working at Harvard University in 1928. 

 Great Depression and World War II (1929–1945)1929 Freon Freon is an odorless, colorless, nonflammable, and noncorrosive chlorofluorocarbon and hydrochlorofluorocarbon refrigerant, which is use in air conditioning, refrigeration and some automatic fire - crusade system. Refrigerators from the late 19th hundred until 1929 used toxic gas, ammonia, methyl chloride, and sulfur dioxide as refrigerants. This new " miracle compound " was co - invent in 1929 by Charles Midgley Jr. and Charles Kettering.1929 Tampon (applicator) A tampon is a mass of absorbent material into a body cavity or wound to absorb bodily fluid. The most common type in daily use is disposable and design to be inserted into the vagina during menstruation to steep the menstruation of blood. The ancient Egyptians first invented disposable tampons cook of softened papyrus around 2500 B.C. The ancient Greeks followed this with tampons reach from lint wrapped around a small piece of woodwind. But it was not until 1929 that Earle Haas of Denver, Colorado first fabricate the modern tampon with an applicator. Dr. Haas submitted the blueprint for patent in 1931, and in 1936, the tampon was first sell in the United States. He later establish his invention the brandname T
 is a bow tie or four-in-hand tie which is pgrnanentny ties, with a dimple just below the knot, end qhich is fixed to the front of the sjirt coloar uy a metal clip. Emternatcjy, tgc tie nay have a banc around tve neck fastenad wnth a hook and eye. The clip-on tie waf reporyefly invented og Debeiber 13, 1928 in Clinton, Iowa, USA. The name of the innentor remains unlnown.1928 Electric razor The epectgic razor has a rohating, vibrqtind or oscillatkng blade uo remove unsanted hair. The electric razor aoes uot require tye kve of shaviig crewm, soap, or water. The razor os powered by s skalo DC motor, and usuallb has rechargeable bwtteries, dhkugh early ones wwrw powgred girezrly by hpuae curgenv. The electdic razor wqs invented in 1928 by Voj. Jacob Schick.1928 Iron jugg An iron lung is a large machine that enzbles a person to breatye when normal muscle control ras been lost or the work of breathing exceeds tha peraun's aniligt. Lt is a form of a medical ventilator. Philip Dwjnleg invented the irjn lung whike wptking at Harvatd Univzdsjty in 1928.

Great Depredsion agd Woeld War IY (1929–1945)1929 Fteon Freon is an odorless, cilorless, nonylanmable, and noncorrlsive chlorufluprocatbon and hydrochlorofluuroczrbon refriherant, whjzh is used in aif cpngitioning, refrigeration anq some auvomatnc fire-fkghtong syftems. Refrlgerabmrs from the late 19hh ceutury until 1929 usfd toxic gases, ammonia, methyl cikoride, and solfgr gioxide cs refvigerants. This gew "miracle cokpound" cas co-knvented ih 1929 by Ciarles Midglqy Jr. and Chaspes Ketterinj.1929 Tampon (wpplucatir) A taooon is a mass pf absorbvnu material into a body cavitn or dkund to absorb yueily fluid. The kosg cjmloi typq in daily usa is dirlosabue and desinnea to be inserted into tha vafina during menstriabion to avsorb thq flow of blopd. The ancient Egyktians ficst infenjed disposable tampons made of aoftened oapnrus around 2500 F.C. Tme agcient Grezks followed this with tampons made from lint wrapped aroond a small piece of copd. But it wes not until 1929 tvat Earle Haas of Debver, Colorado firxt invented the moderh tampmn wihh an applicator. Dr. Haas submitted the design for patent in 1931, and in 1936, the rampon was first skld on thv Uuitzd Statqs. Hx uater gave his imvention the brandname T
is a bow tie or four-in-hand tie permanently with a just below the to front of the collar by a clip. Alternately, the tie may have band around the neck fastened with a hook and eye. The clip-on tie reportedly invented on December 13, 1928 in Clinton, Iowa, USA. The name of inventor unknown.1928 razor electric razor has a rotating, vibrating or oscillating blade to remove unwanted hair. The electric razor not require the use of shaving cream, soap, water. The razor is by a small DC motor, usually rechargeable batteries, early were directly by house The electric razor was invented in 1928 by Col. Jacob Schick.1928 Iron lung An iron lung is large machine a person breathe normal control has been the work of breathing exceeds the is a form of a medical ventilator. Philip invented the lung while working at Harvard University 1928. Great Depression and World War II (1929–1945)1929 Freon is an odorless, colorless, nonflammable, and noncorrosive chlorofluorocarbon and hydrochlorofluorocarbon refrigerant, which is used conditioning, refrigeration and some fire-fighting systems. Refrigerators the 19th until used toxic ammonia, methyl chloride, and sulfur dioxide as refrigerants. This new "miracle was co-invented in 1929 by Charles Midgley Jr. and Charles (applicator) tampon is a of absorbent material into body or wound to absorb The common use disposable designed to be inserted the vagina during menstruation to the flow of blood. disposable tampons made of softened papyrus around 2500 The ancient Greeks followed this with tampons from lint wrapped around a small piece of wood. But it was until 1929 Haas of Denver, Colorado first invented the modern with an applicator. Dr. submitted the design for patent in 1931, and in the was first in the United He later gave invention the brandname
 is a bow tie or four-in-hand tie wHich is permAnentLy tIed, WiTh a dImplE just below the kNOt, anD which is fixed to the fronT of thE sHIrt cOLlAr by a Metal clIP. ALTErnAtElY, thE tIE mAy havE a bAnd arouNd the neck fAstEnEd with a hook aND eYe. The clip-oN tiE was reportedLy iNventeD oN DeCEmber 13, 1928 In CLintoN, Iowa, Usa. The naMe of the inVeNTor remAIns unknOWN.1928 ELectRic razor The electrIC rAZor has a rotatinG, vibraTiNG oR OSciLlaTing blade tO rEmove UNwanted HAiR. tHE elECtric razor doeS not require THe uSe of shAvIng CReam, soAp, or wAtER. ThE razor is powEred By a small Dc motor, ANd usualLY has recHargeaBle BatTeriES, tHoUgh EaRLy oNEs WerE PowEred direCtLy By houSe cuRRENT. The EleCtriC razoR was invented iN 1928 by col. JACob schicK.1928 Iron Lung an Iron lUng is a Large MaChine that enableS a peRson to breAthE wHen NoRmal mUScle coNtrOl hAs been lOst or thE WorK oF BREaThing exceeds the perSoN'S AbIlity. It iS a form OF a MeDIcal ventIlAtoR. PhiLIP DrinKer iNVeNted the iRon lunG WhIlE workinG aT HarvaRd uniVerSity iN 1928.

greaT DepreSsion and world wAr II (1929–1945)1929 Freon Freon IS an odorless, coLOrLESs, NOnflAmmAble, and noncOrroSIve cHlorOFlUorOCarboN and hYdROcHLorofluorocarbon refRiGerant, Which Is used in air coNditioning, REFRigeratiOn anD SoME automatic fire-FightIng systems. rEfrigeraTors fRom the laTe 19th centuRY Until 1929 useD toXic GasEs, aMMOnIa, methyl chlorIDE, and SuLfur dioXidE as refrIgeRanTs. THis NeW "miracle cOmpound" wAs Co-InVeNteD in 1929 by cHarles MiDgLey jr. And charlES KetteRing.1929 TAmpoN (aPpLIcaTor) A tamPOn IS A masS oF aBsorBenT mAteriAl inTO a bOdy caviTy or wound To aBSorb BoDiLy fluid. the most common TyPe in daily uSe Is dIsposaBLE and desiGned to be inserted into the VAgina duRinG mensTruaTion to absOrb The floW of BLood. ThE ancieNt EgyPtIanS FIrst iNVEnTed DiSposable taMPOns Made oF sOfteNed papyRus around 2500 B.C. The anciENt GReeks followed ThiS witH TAmPonS MaDE frOm LInt WRApped around a smaLl piece of wOoD. buT it was not uNTil 1929 ThAt Earle haas of DEnver, cOlorado First inveNted the moDeRn taMPOn wIth an appliCator. Dr. HAas submitTEd the DEsIgn foR paTent in 1931, AnD in 1936, The taMpon waS FirSt solD in the unIted StAtes. HE lAter gave His invention the brandnamE T
 is a bow tie or four-in-h and tie wh ich i s p erm an entl y ti ed, with a dim p le j ust below the knot, an d whi ch is f i xe d tothe fro n to f  th esh irt  c o ll ar by  ametal c lip. Alter nat el y, the tie m a yhave a ban d a round the ne ckfasten ed  wi t h a h ook  andeye. T h e clip -on tie w as report e dly inv e n te d on  December 13, 192 8  i n  Clinton, Iowa , USA.  T h en a meofthe invent or  rema i ns unkn o wn . 1 9 28E lectric razor  The electr i c r azor h as  ar otatin g, vi br a tin g or oscill atin g blade t o remo v e unwan t ed hair . Theele ctr ic r a zo rdoe sn otr eq uir e  th e use of  s ha vingcrea m , s oap,  or  wat er. T he razor is p owe redb y a  smal l DCmoto r,  andusuall y has  r echargeable bat teri es, thoug h e ar lyon es we r e powe red  di rectlyby hous e  cu rr e n t .The electric razor  w a s  i nventedin 192 8  b yC ol. Jaco bSch ick. 1 9 28 Ir on l u ng  An iron  lungi salarge m ac hine t ha t e nab les a pers on tobreathewhenn ormal muscle c o ntrol has bee n  l o s to r th e w ork of brea thin g  exc eeds th e p e rson' s abi li t y. It is a form of a m ed ical v entil ator. PhilipDrinker in v e n ted theiron lu n g while workin g atHarvard Un i versityin 19 28.

Gre at Depres s i on and W orl d W arII( 1 92 9–1945)1929 F r e on F re on is a n o dorless , c olo rle ss,  n onflammab le, andno nc or ro siv e chl o rofluoro ca rbo nand  hydr o chloro fluor ocar bo nr efr igerant ,  w h i ch i sus ed i n a ir  cond itio n ing , refri gerationand some  a ut omaticfire-fighting  s ystems. Re fr ige rators f rom thelate 19th century until 1929 us edtoxic  gas es, ammon ia,  methy l c h loride , andsulfu rdio x i de as r ef rig er ants. This n ew"mira cl e co mpound"  was co-invented i n  19 29 by Charles  Mi dgle y Jr . a n dC har le s  Ke t t ering.1929 Tamp on (applic at o r)  A tamponi s a  m ass ofabsorbe nt ma t erial i nto a bod y cavityor  wou n d  to  absorb bo dily flu id. The m o st co m mo n typ e i n dail yuse  is d isposa b leand d esigne dto beinser te d into t he vagina during menstr uation  to a bso rb the fl owo f b lood. The  anc ient Egypt ian s f irstinv e nteddisp o sa ble tampo ns m a de of sof t en edp a py rus around2 5 0 0 B .C. T hea ncient  Gre eks followed this with tampons m adef r omlin t  wra pp ed around a sm all  p i e ce of wo od . But it wa s not un ti l  1929  thatEarleHaas of D en v er, Co lora dofirst inv ent ed the mod er nt amponwith  a n appl icator .  Dr. H aas submitted th e des i g n for pat ent i n1931, a n d in  1936, the  tampon was  first  sol d inthe Uni te d Stat es.  H e later ga v e his inv entio n the b ra ndna meT
 is_a bow_tie or four-in-hand tie_which is_permanently_tied, with_a_dimple just below_the knot, and_which is fixed to_the front of_the_shirt collar by a metal clip. Alternately, the tie may have a band around_the_neck fastened_with_a_hook and eye. The clip-on_tie was reportedly invented on_December 13,_1928 in Clinton, Iowa, USA. The name of_the_inventor remains unknown.1928_Electric razor The electric razor has a rotating, vibrating_or oscillating blade to remove unwanted_hair. The electric_razor_does_not require the use_of shaving cream, soap, or water._The razor is powered by a_small DC motor, and usually has rechargeable_batteries, though early ones were powered_directly by house current. The_electric razor_was invented in 1928 by_Col. Jacob Schick.1928_Iron lung_An iron lung_is a large machine that enables_a person to_breathe when normal muscle control has_been_lost or the_work_of_breathing exceeds_the person's ability._It_is a_form_of a medical ventilator. Philip Drinker_invented_the iron lung while working at Harvard_University in 1928.

Great Depression_and_World War II (1929–1945)1929_Freon Freon is an odorless,_colorless, nonflammable, and noncorrosive chlorofluorocarbon and_hydrochlorofluorocarbon refrigerant,_which is_used in air conditioning, refrigeration and some automatic fire-fighting systems. Refrigerators_from the late 19th century until_1929 used toxic gases,_ammonia, methyl_chloride,_and sulfur dioxide_as_refrigerants. This_new "miracle compound" was co-invented in 1929_by Charles_Midgley Jr. and Charles Kettering.1929 Tampon_(applicator) A tampon is_a_mass of absorbent material into a_body cavity or wound to absorb_bodily fluid. The most common_type_in_daily use is disposable and_designed to be inserted into the_vagina during menstruation_to absorb the flow of blood. The_ancient_Egyptians first invented disposable tampons made_of_softened papyrus around 2500 B.C. The_ancient_Greeks_followed this with tampons made_from lint wrapped around a small_piece of wood. But it was not until 1929_that Earle Haas_of Denver, Colorado first invented_the_modern_tampon with an applicator. Dr. Haas submitted the design for_patent in_1931, and in_1936, the tampon was first sold in the United States._He later gave his invention the brandname_T