Patents for inventions abridgments of specifications 20001-25000 / 
The Patent Office, Govt. of India 
 - Delhi :  Manager of Publications,  [n. d.] 
 - iii, 36 p. :  frg. ;  24 cm. 
<br/><br/> Group vi.  Filtering and Straining liquids 
<br/><br/><label>Dewey Class. No.: </label>608.754