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{{PatentInfo

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|Inventor=George ~~Copby~~

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|Inventor=George Coby

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|Assignee=George ~~Copby~~

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|Assignee=George Coby

|Country=US

|ApplicationNum=31743

|ApplicationDate=1929-06-18

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|PatentNum=~~D081248~~

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|PatentNum=D079456

|PatentDate=1929-09-24

|PriorityDate=1929-06-18

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contributi

File:Patent-US-D079456.pdf (visualizza wikitesto)