What follows is an opinion from the Supreme Court of the United States. Your task is to identify the disposition of the case, that is, the treatment the Supreme Court accorded the court whose decision it reviewed. The information relevant to this variable may be found near the end of the summary that begins on the title page of each case, or preferably at the very end of the opinion of the Court. For cases in which the Court granted a motion to dismiss, consider "petition denied or appeal dismissed". There is "no disposition" if the Court denied a motion to dismiss.

Opinion:
DIAMOND, COMMISSIONER OF PATENTS AND TRADEMARKS v. BRADLEY et al.
No. 79-855.
Argued October 14, 1980
Decided March 9, 1981
Deputy Solicitor General Wallace argued the cause for petitioner. With him on the briefs were Solicitor General McCree, Assistant Attorney General Litvack, Harriet S. Shapiro, Robert B. Nicholson, Frederic Freilicher, Joseph F. Nakamura, and Thomas E. Lynch.
Nicholas Prasinos argued the cause for respondents. With him on the briefs were Faith F. Driscoll, Henry L. Hanson, and Ronald T. Reiling.
Edward S. Irons, Mary Helen Sears, and Robert P. Beshar filed a brief for National Semiconductor Corp. as amicus curiae urging reversal.
Briefs of amici curiae urging affirmance were filed by Donald R. Dunner, Kenneth E. Kuffner, and Travis Gordon White for the American Patent Law Association, Inc.; by Reed C. Lawlor and James W. Geriak for the Los Angeles Patent Association; and by Morton C. Jacobs for Applied Data Research, Inc., et al.
William James Beard and John F. Tregoning filed a brief for Halliburton Services as amicus curiae.
Per Curiam.
The judgment is affirmed by an equally divided Court.
The Chief Justice ..took no part in the consideration or decision of this case.

Question: What is the disposition of the case, that is, the treatment the Supreme Court accorded the court whose decision it reviewed?

Choices:
stay, petition, or motion granted
affirmed (includes modified)
reversed
reversed and remanded
vacated and remanded
affirmed and reversed (or vacated) in part
affirmed and reversed (or vacated) in part and remanded
vacated
petition denied or appeal dismissed
certification to or from a lower court
no disposition

Answer: 1