WHEREAS, I, Richard Roe, of the City of Chicago, of the County of Cook, and the State of Illinois, did obtain Letters Patent of the United States of America for certain improvements in Airship Construction, which Letters Patent bear date the 10th day of November, 1910, and are numbered 557 and 558.

AND WHEREAS, John Doe is desirous of acquiring an interest therein:

NOW THIS INDENTURE WITNESSETH, That for and in consideration of the sum of Twelve Thousand dollars ($12,000), to me, the said Richard Roe, in hand paid, the receipt of which is hereby acknowledged, I have assigned, sold, and do hereby assign and sell unto the said John Doe, all the right, title and interest which I have in said invention, as secured to me by said Letters Patent, for, to, and in said Improvements in Airship Construction.

THE SAME to be held and enjoyed by the said John Doe for his own use and behoof, and for the use of his legal representatives, to the full end of the term for which said Letters Patent are granted, as fully and entirely as the same would have been held and enjoyed by me if this assignment had not been made.

IN TESTIMONY WHEREOF, I have hereunto set my hand and affixed my seal this the 15th day of June, 1914. (Seal) RICHARD ROE.

Signed, Sealed and Delivered in the presence of HOWARD SHERMAN.