General information on the third edition of the international patent classification 

 - WIPO  Geneva  1979 
 - 36p 
 - Patent classification IPC agreement 
<br/><br/><label>Nat. Bib. No.: </label>3733 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>608.3GEN 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering & Technology
<br/><br/><label>Universal Decimal Class. No.: </label>608.3