Ellis Ridsdale <br/><br/>
Patent assignments 
Ellis Ridsdale 
 - 3rd 
 - New York  Baker, Voorhis & Co., Inc.     1955 
 - lxviii,622p  cm. 
<br/><br/><label>Standard No.: </label>28,130 
<br/><br/><label>Source: </label> Reports / Technical Reports 
<br/><br/><label>Dewey Class. No.: </label>Z73:2673, J5