Great Britain. Department of Trade and Industry   <br/><br/>
About patents : patents as a source of technical information  (Book) 

 - Rev. ed. 
 - London  Patent Office, Department of Trade and Industry  1972 
 - 21 p.  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication of technical information Patents--Registration
<br/><br/><label>Universal Decimal Class. No.: </label>608.3 GRE  / 12707