Lamoreaux, Naomi R. <br/><br/>
Inventive activity and the market for technology in the United States, 1840-1920 

 - Cambridge, Mass. :  National Bureau of Economic Research,  1999 
 - 38 
<br/><br/><label>Subjects--Topical Terms: </label><br/>TECHNOLOGICAL INNOVATIONS--ECONOMIC ASPECTS--UNITED STATES--HISTORY--19TH CENTURY<br/>INVENTIONS--ECONOMIC ASPECTS--UNITED STATES--HISTORY--19TH CENTURY<br/>PATENTS--LAW AND LEGISLATION--ECONOMIC ASPECTS--UNITED STATES--HISTORY--19TH CENTURY
<br/><br/><label>LC Class. No.: </label>HC79 .T4  / L352I