Pai, R B <br/><br/>
Patents for inventions:   A popular introduction  

 - India:   CSIR,   1956 
 - 53p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions 
<br/><br/><label>Subjects--Index Terms: </label>Patents  
<br/><br/><label>Universal Decimal Class. No.: </label>608.1:347.77  / J6