Figure 3-25 



Percent of Citations in Basic Patents, 



by Type of Citation and Source, 1950-61 and 1962-73 



Basic research 

 citations 



Government 



Basic and/or applied 

 research citations 



Patent citations 



Corporations 



Government 



Universities 



Corporations 



1 Includes nonprofit institutions which account for less than 

 3 percent ot ail the citations- 

 SOURCE- Franltlin Pierce College Law Center and the 

 PTl^ Research Foundation 



80 



