United States Patent Office, June 15, 1869

It is proposed as soon as possible after the 1st of July, to photograph the drawings of the current issues, for the purpose of attaching one copy to the patent, of placing in the room of each Examiner a copy of those belonging to his class, of binding a copy of each drawing for the inspection of the public, and for furnishing certified copies at cheaper rates than heretofore. The adoption of this plan has made it necessary to make essential modifications in the rules relating to drawings, to which the careful attention of inventors and agents is invited. It is absolutely necessary to the success of the undertaking that the rules should be rigidly enforced, and drawings which do not comply with them will not be received.

The rules, which are as follows, go into effect immediately.

Drawings -- The applicant for a patent is required by law to furnish duplicate drawings when the nature of the case admits of them. One must be on thick drawing paper, sufficiently stiff to support itself in the portfolio of the Office, for which it is intended. It must be neatly and artistically executed, with such detached sectional views as to clearly show what the invention is, its construction and operation. Each part must be distinguished by the same number of letter whenever it appears in the several drawings. The name of the inventor should be written at the top, the shortest side being considered as such.

The drawing must be signed by the applicant or his attorney and attested by two witnesses, and musts be sent with the specification.

Tracings upon cloth pasted upon thick paper will not be admitted.

Thick drawings should never be folded for transmission, but should be rolled.

The duplicate drawing to be attached to the patent will be furnished by the Office at the expense of the applicant and will be a photographic copy of the thick drawing. A fee of fifty cents per sheet of 10 by 15 inches will be charged, which must be transmitted with the final fee.

If the applicant does not choose to pay this fee he must furnish the duplicate drawing as heretofore. This must be on tracing muslin, which will bear folding and transportation, and not on paper. It need not be forwarded until the patent to which it is to be attached is ordered to issue. It must have, for the purpose of attaching it, a margin of one inch on the right hand.

Copies of drawings of patents issued after July 1, 1869, will be furnished to any one at the uniform rate of fifty cents per sheet of standard size.

The following rules must be observed in the preparation of the drawings in order that they may be photographed. They must be executed in deep black lines, to give distinctness to the print. In shading, small lines of black ink should be used. Pale, ashy tints should be dispensed with. All colors except black should be avoided, even in lettering; but light blue, pink, and brown, are entirely inadmissible, and deep blue, yellow, and carmine take black.

The sheet should not be larger than 10 by 15 inches, that being the size of the patent. If more illustrations are needed, several sheets must be used.

Applicants are advised to employ competent artists to make the drawings, which will be returned if not executed in strict conformity with these rules, or if injured by folding.

S.S. Fisher, Commissioner of Patents