What follows is an opinion from a United States Court of Appeals.
Intervenors who participated as parties at the courts of appeals should be counted as either appellants or respondents when it can be determined whose position they supported. For example, if there were two plaintiffs who lost in district court, appealed, and were joined by four intervenors who also asked the court of appeals to reverse the district court, the number of appellants should be coded as six.
When coding the detailed nature of participants, use your personal knowledge about the participants, if you are completely confident of the accuracy of your knowledge, even if the specific information is not in the opinion. For example, if "IBM" is listed as the appellant it could be classified as "clearly national or international in scope" even if the opinion did not indicate the scope of the business. 

Your task concerns the first listed respondent. The nature of this litigant falls into the category "federal government (including DC)", specifically "other agency, beginning with "O" thru "R"". Your task is to determine which specific federal government agency best describes this litigant.

Opinion:
In re OWEN.
Court of Appeals of District of Columbia.
Submitted March 13, 1928.
Decided April 2, 1928.
No. 2038.
I. Patents <§=>28 — Originality and beauty are necessary to obtain design patent; mere mechanical skill being insufficient (35 USCA § 73).
To entitle one to a design patent under Rev. St. § 4929, as amended (35 USCA § 73; Comp. St. § 9475), there must be originality and beauty; mere mechanical skill being insufficient.
2.. Patents <§=>22 — Substitution of handles, differing little in design from handles of prior art, on ends of electric storage battery container, held not to involve invention (35 US CA § 73).
Mere substitution of handles, differing little in design from handles of prior art, on ends of electric storage battery container, held not tó. involve invention, entitling applicant to design patent under Rev. St. § 4929, as amended (35 'USCA § 73; Comp. St. § 9475).
Appeal from the Commissioner of Patents.
In the matter of the application of Prederieka D. Owen, administratrix of the estate of Richard B. Owen, deceased, for a design patent. Prom a decision of the Commissioner of Patents refusing to allow the application, applicant appeals.
Affirmed.
B. F. Garvey, of Washington, D. C., for appellant.
T. A. Hostetler, of Washington, D. C., for appellee.
Before MARTIN, Chief Justice, and ROBB and VAN ORSDEL, Associate Justices.
ROBB, Associate Justice.
Appeal from a decision of the Patent Office refusing to allow appellant’s application for a design patent in the form of an electric storage battery container.
The container is a plain, rectangular receptacle, with a handle projecting from the top of each end.
Section 4929, R. S., as amended (35 USCA § 73; Comp. St. § 9475), provides that “any person who has invented any new, original, and ornamental design for an article of manufacture, not known or used by others in this country before his invention thereof, and not patented or described in any printed publication in this or any foreign country before his invention thereof, * * * may, upon payment of the fees required by law and other due proceedings had, * * * obtain a patent therefor.”
To entitle one to a design patent, there must be “originality and beauty. Mere mechanical skill is insufficient.” Smith v. Whitman Saddle Co., 148 U. S. 674, 13 S. Ct. 768, 37 L. Ed. 606. See, also, H. C. White Co. v. M. E. Converse & Sons Co. (C. C. A.) 20 F.(2d) 311.
As observed by the Commissioner, handles were old, and the mere substitution of applicant’s handle, which differs little in design from the handles of the prior art, does not involve invention.
The decision is affirmed.
Affirmed.

Question: This question concerns the first listed respondent. The nature of this litigant falls into the category "federal government (including DC)", specifically "other agency, beginning with "O" thru "R"". Which specific federal government agency best describes this litigant?

Choices:
Occupational Safety & Health Administration
Occupational Safety & Health Review Commission
Office of the Federal Inspector
Office of Management & Budget
Office of Personnel Management
Office of Workers Compensation Program
Parole board or parole commisssion, or prison official, or US Bureau of Prisons
Patent Office
Postal Rate Commission (U.S.)
Postal Service (U.S.)
RR Adjustment Board
RR Retirement Board

Answer: 7