Modifiche

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Riga 2: Riga 2:  
|Inventor=William A. Houston, Dillman Charles Houston
 
|Inventor=William A. Houston, Dillman Charles Houston
 
|Assignee=William A. Houston, Dillman Charles Houston
 
|Assignee=William A. Houston, Dillman Charles Houston
 +
|Country=US
 
|ApplicationNum=151459
 
|ApplicationNum=151459
 
|ApplicationDate=1926-11-29
 
|ApplicationDate=1926-11-29