Patent directory of Sri Lanka 

 - Colombo  Sri Lanka Inventors Commission  1994 
 - xxviii,105 p.  Illustration 
<br/><br/> details of inventions patented by Sri Lankans from 1980 upto December 31, 1992 and the list of Sri Lankan's patents granted during the year 1993. 
<br/><br/><label>ISBN: </label>9559315005 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BOOKS BOX 443<br/>INTERNATIONAL LAWS<br/>INVENTORS
<br/><br/><label>Dewey Class. No.: </label>B0443  / LDC