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twenty-eight hundred and thirty-eight, twenty-eight hundred and thirty-nine, twenty-eight hundred and fortyone, twenty-eight hundred and forty-three, twenty-eight hundred and forty-five, twenty-eight hundred and fiftythree, twenty-eight hundred and fifty-four, twenty-eight hundred and fifty-six, twenty-eight hundred and fiftyeight, twenty-eight hundred and sixty, twenty-nine hundred, and twenty-nine hundred and two, twenty-nine hundred and five, twenty-nine hundred and seven, twenty-nine hundred and eight, twenty-nine hundred and nine, twenty-nine hundred and twenty-two, twenty-nine hundred and twenty-three, twenty-nine hundred and twenty-four, twenty-nine hundred and twenty-seven, twenty-nine hundred and twenty-nine, twenty-nine hundred and thirty, twenty-nine hundred and thirty-one, twenty-nine hundred and thirty-two, twenty-nine hundred and forty-three, twenty-nine hundred and forty-five, twenty-nine hundred and fifty-two, three thousand and eleven, three thousand and twelve, three thousand and twelve and one-half, three thousand and thirteen, of the Revised Statutes of the United States, be, and the same are hereby, repealed, and sections nine, ten, eleven, twelve, fourteen, and sixteen of an act entitled “An act to amend the customs-revenue laws and to repeal moieties," approved June twentysecond, eight hundred and seventy-four, and sections seven, eight, and nine of the act entitled "An act to reduce internal-revenue taxation, and for other purposes,' approved March third, eighteen hundred and eightythree, and all other acts and parts of acts inconsistent with the provisions of this act, are hereby repealed, but the repeal of existing laws or modifications thereof embraced in this act shall not affect any act done, or any right accruing or accrued, or any suit or proceeding had or commenced in any civil cause before the said repeal or modifications; but all rights and liabilities under said laws shall continue and may be enforced in the same manner as if said repeal or modifications had not been made. Any offenses committed, and all penalties or forfeitures or liabilities incurred prior to the passage of this act under any statute embraced in or changed, modified, or repealed by this act may be prosecuted and punished in the same manner and with the same effect as if this act had not been passed. All acts of limitation, whether applicable to civil causes and proceedings or to the prosecution of offenses or for the recovery of penalties or forfeitures embraced in or modified, changed, or repealed by this act, shall not be affected thereby; and all suits, proceedings, or prosecutions, whether civil or criminal, for causes arising or acts done or committed prior to the passage of this act, may be commenced and prosecuted within the same time and with the same effect as if this act had not been passed. And provided further, That nothing in this act shall be construed to repeal the provisions of section three thousand and fiftyeight of the Revised Statutes as amended by the act approved February twenty-third, eighteen hundred and eighty-seven, in respect to the abandonment of merchandise to underwriters or the salvors of property, and the ascertainment of duties thereon.

SEC. 30. That this act shall take effect on the first day of August, eighteen hundred and ninety, except so much of section twelve as provides for the appointment of nine general appraisers, which shall take effect immediately.

Approved, June 10, 1890.

APPENDIX D.

RULES OF PRACTICE IN THE UNITED STATES

PATENT OFFICE.

CORRESPONDENCE. 1. All business with the office should be transacted in writing l'nless by the consent of all parties, the action of the office will be based exclusively on the written record. So attention will be paid to any alleged oral promise, stipulation, or understanding in relation to which there is a disagreement or doubt.

2. All office letters must be sent in the name of the "Commissioner of Patents." All letters and other communications intended for the office must be addressed to him; if addressed to any of the other officers, they will ordinarily be returned.

3. Express charges, freight, postage, and all other charges on matter sent to the Patent Office must be prepaid in full; otherwise it will not be received.

4. The personal attendance of applicants at the Patent Office is unnecessary. Their business can be transacted by correspondence.

5. The assignee of the entire interest of an invention is entitled to hold correspondence with the office to the exclusion of the inventor. (See Rule 20.)

6. When there has been an assignment of an undivided part of an invention, amendments and other actions requiring the signature of the inventor must also receive the written assent of the assignee; but official letters will

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only be sent to the post-office address of the inventor, unless he shall otherwise direct.

7. When an attorney shall have filed his power of attorney, duly executed, the correspondence will be held with him.

8. A double correspondence with the inventor and an assignee, or with a principal and his attorney, or with two attorneys, cannot generally be allowed.

9. A separate letter should in every case be written in relation to each distinct subject of inquiry or application. Assignments for record, final fees, and orders for copies or abstracts must be sent to the office in separaie letters.

Papers sent in violation of this rule will be returned.

10. When a letter concerns an application, it should state the name of the applicant, the title of the invention, the serial number of the application (see Rule 31), and the date of filing the same. (See Rule 32.)

11. When the letter concerns'a patent it should state the name of the patentee, the title of the invention, and the number and date of the patent.

12. No attention will be paid to unverified ex parte statements or protests of persons concerning pending applications to which they are not parties, unless information of the pendency of such applications shall have been voluntarily communicated by the applicants.

13. Letters received at the office will be answered, and orders for printed copies filled, without unnecessary delay. Telegrams, if not received before 3 o'clock p. m., can not ordinarily be answered until the following day.

INFORMATION TO CORRESPONDENTS. 14. The office can not respond to inquiries as to the novelty of an alleged invention in advance of the filing

of an application for a patent, nor to inquiries propounded with a view to ascertaining whether any alleged improvements have been patented, and, if so, to whom; nor can it act as an expounder of the patent law, nor as counsellor for individuals, except as to questions arising within the office.

Of the propriety of making an application for a patent, the inventor must judge for himself. The office is open to him, and its records and models pertaining to all patents granted may be inspected either by himself or by any attorney or expert he may call to his aid, and its reports are widely distributed. (See Rule 210.) Further than this the office can render him no assistance until his case comes regularly before it in the manner prescribed by law. A copy of the rules, with this section marked, sent to the individual making an inquiry of the character referred to, is intended as a respectful answer by the office.

Examiners' digests are not open to public inspection.

15. Caveats and pending applications are preserved in secrecy. No information will be given, without authority, respecting the filing by any particular person of a caveat or of an application for a patent or for the reissue of a patent, the pendency of any particular case before the office, or the subject-matter of any particular application, unless it shall be necessary to the proper conduct of business before the office, as provided by Rules 97, 103, and 108.

16. After a patent has issued, the model, specification, drawings, and all documents relating to the case are subject to general inspection, and copies, except of the model, will be furnished at the rates specified in Rule 204.

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