Hopenhayn, Hugo A. <br/><br/>
Innovation fertility and patent design 

 - Cambridge, Mass. :  National Bureau of Economic Research,  1999 
 - 34 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PATENT LAW AND LEGISLATION--ECONOMIC ASPECTS--UNITED STATES--MATHEMATICAL MODELS<br/>TECHNOLOGICAL INNOVATIONS--ECONOMIC ASPECTS--UNITED STATES--MATHEMATICAL MODELS<br/>MODELS (PATENTS)--UNITED STATES
<br/><br/><label>LC Class. No.: </label>KF3142 .A1  / H663I