Private Law 16–LXXXIX

Letters patent for an engine for producing motive power to issue.

That letters patent be issued, in the usual form, to Francis B. Ogden, a citizen of the United States, for “an engine for producing motive power, whereby a greater quantity of power is obtained by a given quantity of fuel than heretofore,” upon his com-plying with all the provisions of the several acts of Congress relative to

Proviso.

the issuing of letters patent: Provided, That, instead of the oath required by law to be made by an inventor, it shall be sufficient for the said Francis B. Ogden to swear or affirm “that he does verily believe that he, in conjunction with one John Ericsson, a subject of the King

Proviso.

of Sweden, is the true inventor of said engine:” And provided, also, That he shall further swear or affirm “that the said John Ericsson hath made to him a bona fide assignment of all the right, title, and interest, of him, the said John, in and to the said invention in the United States of America.”

Sec. 2.

And be it further enacted, That the said letters patent, and all the privileges thereby granted to the said Francis B. Ogden, shall cease, determine, and become absolutely null and void, without resort TWENTY-THIRD CONGRESS. Sess. II. Ch. 90, 91, 92. 1835.to legal process, to repeal, annul, or cancel the same, in case the said Francis B. Ogden or his assigns shall fail to introduce the said invention into public use in the United States, within two years from the passing of this act, or in case of his or their omission to continue such public use in the United States for the period of one entire year at any time after such introduction thereof.

Sec. 3.

And be it further enacted, That no patent heretofore granted

Patent not to be invalidated by one granted in a foreign country.

to the said Ogden and Ericsson, or to either of them, for said invention, in any foreign country, shall have the effect to invalidate the patent to be granted under and by virtue of this act.