Patent 145280-145301 

 - Calcutta  Government of India- Patent Office 
<br/><br/> Patent, 145280- Inorganic chemistry 145281-drilling; 145282-ferroalloys 
<br/><br/><label>Subjects--Index Terms: </label>drilling Inorganic Chemistry 
<br/><br/><label>Universal Decimal Class. No.: </label>(088.8)(540)  / IND