Patents for Inventions Abridgments of Specifications (25001-30000) 

 - Group 8th 
 - Delhi India  The Manager of Publications  1954 
 - 19p 
 -  Group 8th .
<br/><br/> Patents for Inventions Abridgments of Specifications (25001-30000) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General Science
<br/><br/><label>Dewey Class. No.: </label>608/I.G.