Lampe, Ryan L <br/><br/>
Patent pools and the direction of innovation :  Evidence from the 19th-century sewing machine industry / 
Ryan L. Lampe  and Petra Moser 
 - Cambridge  NBER  2011 
 - 36p 
 - NBER Working Paper ;  17573 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>NBERWP  17573<br/>E6778.pdf