Patents for inventions abridgments of specifications 25001-30000 / 
The Patent Office, Govt. of India 
 - Delhi :  Manager of Publication,  [n. d.] 
 - iii, 34 p. :  frg. ;  24 cm. 
<br/><br/> Group vi. Filtering and Straining Liquids. 
<br/><br/><label>Dewey Class. No.: </label>608.754