3. Special provisions occasioned by the burning the patent office.

38. The act of March 3, 1837, was passed to remedy the inconveniences arising from the burning of the patent office. It is enacted,

39. - Sect. 1. That any person who may be in possession of, or in any way interested in, any patent for an invention, disocovery, or improvement, issued prior to the fifteenth day of December, in the year of our Lord one thosand eight hundred and thirty-six, or in an assignment of any patent, or interest therein, executed, and recorded prior to the said fifteenth day of December, may, without charge, on presentation or transmission thereof to the commissioner of patents, have the same recorded anew in the patent office, together with the descriptions, specifications of claim and drawings annexed or belonging to the same; and it shall be the duty of the commisioner to cause the same, or any authenticated copy of the original record, specification, or drawing which he may obtain, to be transcribed and copied into books of record to be kept for that purpose; and wherever a drawing was not originally annexed to the patent and referred to in the specification and drawing produced as a delineation of the invention, being verified by oath in such manner as the commissioner shall require, may be transmitted and placed on file, or copied as aforesaid, together with the certificate of the oath; or such drawings may be made in the office, under the direction of the commisioner, in conformity with the specification. And it shall be the duty of the commissioner to take such measures as may be advised and determined by the board commissioners provided for by the fourth section, of this act, to obtain the patents, specifications, and copies aforesaid, for the purpose of being so transcribed and recorded. And it shall be the duty of each of the several clerks of the judicial courts of the United States, to transmit, as soon as may be, to the commissioner of the patent office, a statement of all the authenticated copies of patents, descriptions, specifications, and drawings of inventions and discoveries made and executed prior to the aforesaid fifteenth day of December, which may be found on the files of his office; and also to make out and transmit to said commissioner for record as aforesaid, a certified copy of every such patent, description, specification, or drawing, which shall be specially required by such commissioner.

40. - Sect. 2. That copies of such record and drawings, certified by the commissioner, or, in his absence, by the chief clerk, shall be prima facie evidence of the particulars of the invention and of the patent granted therefore, in any judicial court of the United States, in all cases where copies of the original record or specification and drawings would be evidence, without proof of the loss of such originals and no patent issued therefor by the patentee or other person inprior to the aforesaid, fifteenth day of December, shall, after the first day of June next, be received in evidence in, any of the said courts in behalf of the patentee or other person who shall be in possession of the same, unless it shall have been so recorded anew, and a drawing of the invention, if separate from the patent, verified as, aforesaid, deposited in the patent office; nor shall any written assignment of any such patent, executed and, recorded prior to the said fifteenth day of December, be received in evidence in any of the said courts in behalf of the assignee or other person in possession thereof, until it shall have been so recorded anew.

41. - Sect. 3. That whenever it shall appear to the commissioner that any patent was destroyed by the burning of the patent office building on the aforesaid fifteenth day of December, or was otherwise lost prior thereto, it shall be his duty, on application terested therein, to issue a new patent for the same invention or discovery bearing the date of the original patent, with his certificate thereon that it was made and issued pursuant to the provisions of the third section of this act, and shall enter the same of record: Provided, however, That before such patent shall be issued, the applicant therefor shall deposit in the patent office a duplicate, as near as may be, of the original model, drawings, and description, with specification of the invention or discovery, verified by oath, as shall be required by the commissioner; and such patent and copies of such drawings and descriptions, duly certified, shall be admissible as evidence in any judicial court of the United States, and shall protect the rights of the patentee, his administrators, heirs and assigns, to the extent only in which they would have been protected by the original patent and specification.

42. The act of August 29, 1842, sect. 2, extends the provisions of the last section to patents granted prior to the said fifteenth day of December, though they may have been lost subsequently; provided, however, the same shall not have been recorded anew under the provisions of said act.