Grant of permission for taking out patents by Govt. Servants engaged in technical research.  
 File No.      P.H.2R-91/34 

 -  1933 
 - 10 P;  H-35 cm; W-22 cm 
<br/><br/> সচিবালয় রেকর্ডরুম সংগ্রহ (প্রথম পর্যায়) <br/><br/> 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Grant of permission