Pratt Fletcher. <br/><br/>
Famous inventors and their inventions 

 -  1955 
<br/><br/><label>Standard No.: </label>9,617 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INDUSTRIAL ARTS
<br/><br/><label>Dewey Class. No.: </label>M:A, J5