When the nature of the case admits of drawings the applicant must furnish a drawing of the required size, signed by the inventor or his attorney in fact, and attested by two witnesses. In all cases which admit of representation by model, the applicant, if required by the Patent Office, shall furnish a model of conveni ent size to exhibit advantageously the several parts of his invention or dis covery.
The applicant shall make oath that he believes himself to be the original and first inventor or discoverer of the art, machine, manufacture, composition or improvement for which he solicits a pat ent; that he does not know and does not believe that the same was ever before known or used before his invention or discovery thereof, and shall state of what country he is a citizen and where he resides. In every original application the applicant must distinctly state under oath that the invention has not been patented or described in any printed pub lication in any country before his inven tion or discovery thereof or more than two years prior to his application. If any application for patent has been filed in any foreign country by the applicant in the United States, or by his legal rep resentatives or assigns, prior to his application in the United States, he shall state the country or countries in which such application has been filed, giving the date of such application, and shall also state that no application has been filed in any other country or countries than those mentioned; that to the best of his knowledge and belief the invention had not been in public use or on sale in the United States, for more than two years prior to his application.
On the filing of such application and the payment of the fees required by law, if, on examination, it appears that the applicant is justly entitled to a patent under the law, and that the same is sufficiently useful and important, the Commissioner will issue a patent there for. Every patent or any interest therein shall be assignable in law by an instrument in writing; and the patentee or his assigns or legal representatives may, in like manner, grant and convey an exclusive right under his patent to the whole or any specified part of the United States.
Reissues.—A reissue is granted to the original patentee, his legal representa tives or the assignees of the entire in terest when, by reason of a defective or insufficient specification, or by reason of the patentee claiming as his invention or discovery more than he had a right to claim as new, the original patent is in operative or invalid, provided the error has arisen from inadvertence, accident, or mistake, without any fraudulent or deceptive intention. Reissue applica tions must be made and the specifications sworn to by the inventors if they be living.
Fees.—Fees paid in advance are as follows: On filing each original applica tion for a patent, except in design cases, $15. On issuing each original patent, except in design cases, $20. In design cases, for three years and six months $10; for seven years $15, for 14 years $30. On every application for the re issue of a patent $30. On filing each dis claimer $10.
Following are the figures for patents granted and applied for at the Patent Office in 1920.