Task: sc_issue_8

What follows is an opinion from the Supreme Court of the United States. Your task is to determine the issue of the Court's decision. Determine the issue of the case on the basis of the Court's own statements as to what the case is about. Focus on the subject matter of the controversy rather than its legal basis.

Mr. Justice Clark
delivered the opinion of the Court.
The question before us is whether the maintenance and enforcement of a patent obtained by fraud on the Patent Office may be the basis of an action under § 2 of the Sherman Act, and therefore subject to a treble damage claim by an injured party under § 4 of the Clayton Act. The respondent, Food Machinery & Chemical Corp. (hereafter Food Machinery), filed this suit for infringement of its patent No. 2,328,655 covering knee-action swing diffusers used in aeration equipment for sewage treatment systems. Petitioner, Walker Process Equipment, Inc. (hereafter Walker), denied the infringement and counterclaimed for a declaratory judgment that the patent was invalid. After discovery, Food Machinery moved to dismiss its complaint with prejudice because the patent had expired. Walker then amended its counterclaim to charge that Food Machinery had “illegally monopolized interstate and foreign commerce by fraudulently and in bad faith obtaining and maintaining ... its patent . . . well knowing that it had no basis for ... a patent.” It alleged fraud on the basis that Food Machinery had sworn before the Patent Office that it neither knew nor believed that its invention had been in public use in the United States for more than one year prior to filing its patent application when, in fact, Food Machinery was a party to prior use within such time. The counterclaim further asserted that the existence of the patent had deprived Walker of business that it would have otherwise enjoyed. Walker prayed that Food Machinery’s conduct be declared a violation of the antitrust laws and sought recovery of treble damages.
The District Court granted Food Machinery’s motion and dismissed its infringement complaint along with Walker’s amended counterclaim, without leave to amend and with prejudice. The Court of Appeals for the Seventh Circuit affirmed, 335 F. 2d 315. We granted cer-tiorari, 379 U. S. 957. We have concluded that the enforcement of a patent procured by fraud on the Patent Office may be violative of § 2 of the Sherman Act provided the other elements necessary to a § 2 case are present. In such event the treble damage provisions of § 4 of the Clayton Act would be available to an injured party.
I.
As the case reaches us, the allegations of the counterclaim, as to the fraud practiced upon the Government by Food Machinery as well as the resulting damage suffered by Walker, are taken as true. We, therefore, move immediately to a consideration of the legal issues presented.
Both Walker and the United States, which appears as amicus cunde, argue that if Food Machinery obtained its patent by fraud and thereafter used the patent to exclude Walker from the market through “threats of suit” and prosecution of this infringement suit, such proof would establish a prima facie violation of § 2 of the Sherman Act. On the other hand, Food Machinery says that a patent monopoly and a Sherman Act monopolization cannot be equated; the removal of the protection of a patent grant because of fraudulent procurement does not automatically result in a § 2 offense. Both lower courts seem to have concluded that proof of fraudulent procurement may be used to bar recovery for infringement, Precision Instrument Mfg. Co. v. Automotive Maintenance Machinery Co., 324 U. S. 806 (1945), but not to establish invalidity. As the Court of Appeals expressed the proposition, “only the government may ‘annul or set aside’ a patent,” citing Mowry v. Whitney, 14 Wall. 434 (1872). It went on to state that no case had “decided, or hinted that fraud on the Patent Office may be turned to use in an original affirmative action, instead of as an equitable defense. . . . Since Walker admits that its anti-trust theory depends on its ability to prove fraud on the Patent Office, it follows that . . . Walker’s second amended counterclaim failed to state a claim upon which relief could be granted.” 335 F. 2d, at 316.
II.
We have concluded, first, that Walker’s action is not barred by the rule that only the United States may sue to cancel or annul a patent. It is true that there is no statutory authority for a private annulment suit and the invocation of the equitable powers of the court might often subject a patentee “to innumerable vexatious suits to set aside his patent.” Mo wry, supra, at 441. But neither reason applies here. Walker counterclaimed under the Clayton Act, not the patent laws. While one of its elements is the fraudulent procurement of a patent, the action does not directly seek the patent’s annulment. The gist of Walker’s claim is that since Food Machinery obtained its patent by fraud it cannot enjoy the limited exception to the prohibitions of § 2 of the Sherman Act, but must answer under that section and § 4 of the Clayton Act in treble damages to those injured by any monopolistic action taken under the fraudulent patent claim. Nor can the interest in protecting patentees from “innumerable vexatious suits” be used to frustrate the assertion of rights conferred by the antitrust laws. It must be remembered that we deal only with a special class of patents, i. e., those procured by intentional fraud.
Under the decisions of this Court a person sued for infringement may challenge the validity of the patent on various grounds, including fraudulent procurement. E. g., Precision Instrument Mfg. Co. v. Automotive Maintenance Machinery Co., 324 U. S. 806 (1945); Hazel-Atlas Co. v. Hartford-Empire Co., 322 U. S. 238 (1944); Keystone Driller Co. v. General Excavator Co., 290 U. S. 240 (1933). In fact, one need not await the filing of a threatened suit by the patentee; the validity of the patent may be tested under the Declaratory Judgment Act, 28 U. S. C. § 2201 (1964 ed.). See Kerotest Mfg. Co. v. C-O Two Fire Equipment Co., 342 U. S. 180, 185 (1952). At the same time, we have recognized that an injured party may attack the misuse of patent rights. See, e. g., Mercoid Corp. v. Mid-Continent Investment Co., 320 U. S. 661 (1944). To permit recovery of treble damages for the fraudulent procurement of the patent coupled with violations of § 2 accords with these long-recognized procedures. It would also promote the purposes so well expressed in Precision Instrument, supra, at 816:
“A patent by its very nature is affected with a public interest. ... [It] is an exception to the general rule against monopolies and to the right to access to a free and open market. The far-reaching social and economic consequences of a patent, therefore, give the public a paramount interest in seeing that patent monopolies spring from backgrounds free from fraud or other inequitable conduct and that such monopolies are kept within their legitimate scope.”
III.
Walker’s counterclaim alleged that Food Machinery obtained the patent by knowingly and willfully misrepresenting facts to the Patent Office. Proof of this assertion would be sufficient to strip Food Machinery of its exemption from the antitrust laws. By the same token, Food Machinery’s good faith would furnish a complete defense. This includes an honest mistake as to the effect of prior installation upon patentability — so-called “technical fraud.”
To establish monopolization or attempt to monopolize a part of trade or commerce under § 2 of the Sherman Act, it would then be necessary to appraise the exclusionary power of the illegal patent claim in terms of the relevant market for the product involved. Without a definition of that market there is no way to measure Food Machinery’s ability to lessen or destroy competition. It may be that the device — knee-action swing diffusers — used in sewage treatment systems does not comprise a relevant market. There may be effective substitutes for the device which do not infringe the patent. This is a matter of proof, as is the amount of damages suffered by Walker.
As respondent points out, Walker has not clearly articulated its claim. It appears to be based on a concept of per se illegality under § 2 of the Sherman Act. But in these circumstances, the issue is premature. As the Court summarized in White Motor Co. v. United States, 372 U. S. 253 (1963), the area of per se illegality is carefully limited. We are reluctant to extend it on the bare pleadings and absent examination of market effect and economic consequences.
However, even though the per se claim fails at this stage of litigation, we believe that the case should be remanded for Walker to clarify the asserted violations of § 2 and to offer proof thereon. The trial court dismissed its suit not because Walker failed to allege the relevant market, the dominance of the patented device therein, and the injurious consequences to Walker of the patent’s enforcement, but rather on the ground that the United States alone may “annul or set aside” a patent for fraud in procurement. The trial court has not analyzed any economic data. Indeed, no such proof has yet been offered because of the disposition below. In view of these considerations, as well as the novelty of the claim asserted and the paucity of guidelines available in the decided cases, this deficiency cannot be deemed crucial. Fairness requires that on remand Walker have the opportunity to make its § 2 claims more specific, to prove the alleged fraud, and to establish the necessary elements of the asserted § 2 violation.
Reversed and remanded.
26 Stat. 209, 15 U. S. C. § 2 (1964 ed.):
“Every person who shall monopolize, or attempt to monopolize, or combine or conspire with any other person or persons, to monopolize any part of the trade or commerce among the several States, or with foreign nations, shall be deemed guilty of a misdemeanor . . . .”
38 Stat. 731, 15 U. S. C. § 15 (1964 ed.):
“Any person who shall be injured in his business or property by reason of anything forbidden in the antitrust laws may sue therefor in any district court of the United States in the district in which the defendant resides or is found or has an agent, without respect to the amount in controversy, and shall recover threefold the damages by him sustained, and the cost of suit, including a reasonable attorney’s fee.”
The patent in question was issued in the name of the inventor, Lannert. But he had previously assigned the patent rights to his employer, Chicago Pump Company, a division of Food Machinery.
See, e. g., United States v. New Wrinkle, Inc., 342 U. S. 371, 376 (1952).
This conclusion applies with equal force to an assignee who maintains and enforces the patent with knowledge of the patent’s infirmity.

Question: What is the issue of the decision?
年. involuntary confession
数. habeas corpus
日. plea bargaining: the constitutionality of and/or the circumstances of its exercise
的. retroactivity (of newly announced or newly enacted constitutional or statutory rights)
月. search and seizure (other than as pertains to vehicles or Crime Control Act)
用. search and seizure, vehicles
成. search and seizure, Crime Control Act
名. contempt of court or congress
时. self-incrimination (other than as pertains to Miranda or immunity from prosecution)
件. Miranda warnings
一. self-incrimination, immunity from prosecution
请. right to counsel (cf. indigents appointment of counsel or inadequate representation)
中. cruel and unusual punishment, death penalty (cf. extra legal jury influence, death penalty)
据. cruel and unusual punishment, non-death penalty (cf. liability, civil rights acts)
码. line-up
不. discovery and inspection (in the context of criminal litigation only, otherwise Freedom of Information Act and related federal or state statutes or regulations)
新. double jeopardy
文. ex post facto (state)
下. extra-legal jury influences: miscellaneous
分. extra-legal jury influences: prejudicial statements or evidence
入. extra-legal jury influences: contact with jurors outside courtroom
人. extra-legal jury influences: jury instructions (not necessarily in criminal cases)
功. extra-legal jury influences: voir dire (not necessarily a criminal case)
上. extra-legal jury influences: prison garb or appearance
户. extra-legal jury influences: jurors and death penalty (cf. cruel and unusual punishment)
为. extra-legal jury influences: pretrial publicity
间. confrontation (right to confront accuser, call and cross-examine witnesses)
号. subconstitutional fair procedure: confession of error
取. subconstitutional fair procedure: conspiracy (cf. Federal Rules of Criminal Procedure: conspiracy)
回. subconstitutional fair procedure: entrapment
在. subconstitutional fair procedure: exhaustion of remedies
页. subconstitutional fair procedure: fugitive from justice
字. subconstitutional fair procedure: presentation, admissibility, or sufficiency of evidence (not necessarily a criminal case)
有. subconstitutional fair procedure: stay of execution
个. subconstitutional fair procedure: timeliness
作. subconstitutional fair procedure: miscellaneous
示. Federal Rules of Criminal Procedure
出. statutory construction of criminal laws: assault
是. statutory construction of criminal laws: bank robbery
失. statutory construction of criminal laws: conspiracy (cf. subconstitutional fair procedure: conspiracy)
表. statutory construction of criminal laws: escape from custody
除. statutory construction of criminal laws: false statements (cf. statutory construction of criminal laws: perjury)
加. statutory construction of criminal laws: financial (other than in fraud or internal revenue)
败. statutory construction of criminal laws: firearms
生. statutory construction of criminal laws: fraud
信. statutory construction of criminal laws: gambling
类. statutory construction of criminal laws: Hobbs Act; i.e., 18 USC 1951
置. statutory construction of criminal laws: immigration (cf. immigration and naturalization)
理. statutory construction of criminal laws: internal revenue (cf. Federal Taxation)
本. statutory construction of criminal laws: Mann Act and related statutes
息. statutory construction of criminal laws: narcotics includes regulation and prohibition of alcohol
行. statutory construction of criminal laws: obstruction of justice
定. statutory construction of criminal laws: perjury (other than as pertains to statutory construction of criminal laws: false statements)
改. statutory construction of criminal laws: Travel Act, 18 USC 1952
市. statutory construction of criminal laws: war crimes
期. statutory construction of criminal laws: sentencing guidelines
以. statutory construction of criminal laws: miscellaneous
修. jury trial (right to, as distinct from extra-legal jury influences)
元. speedy trial
方. miscellaneous criminal procedure (cf. due process, prisoners' rights, comity: criminal procedure)
录. voting
区. Voting Rights Act of 1965, plus amendments
单. ballot access (of candidates and political parties)
位. desegregation (other than as pertains to school desegregation, employment discrimination, and affirmative action)
型. desegregation, schools
法. employment discrimination: on basis of race, age, religion, illegitimacy, national origin, or working conditions.
县. affirmative action
存. slavery or indenture
品. sit-in demonstrations (protests against racial discrimination in places of public accommodation)
前. reapportionment: other than plans governed by the Voting Rights Act
称. debtors' rights
注. deportation (cf. immigration and naturalization)
值. employability of aliens (cf. immigration and naturalization)
输. sex discrimination (excluding sex discrimination in employment)
建. sex discrimination in employment (cf. sex discrimination)
能. Indians (other than pertains to state jurisdiction over)
大. Indians, state jurisdiction over
例. juveniles (cf. rights of illegitimates)
度. poverty law, constitutional
始. poverty law, statutory: welfare benefits, typically under some Social Security Act provision.
到. illegitimates, rights of (cf. juveniles): typically inheritance and survivor's benefits, and paternity suits
面. handicapped, rights of: under Rehabilitation, Americans with Disabilities Act, and related statutes
载. residency requirements: durational, plus discrimination against nonresidents
点. military: draftee, or person subject to induction
密. military: active duty
动. military: veteran
果. immigration and naturalization: permanent residence
图. immigration and naturalization: citizenship
提. immigration and naturalization: loss of citizenship, denaturalization
发. immigration and naturalization: access to public education
式. immigration and naturalization: welfare benefits
国. immigration and naturalization: miscellaneous
登. indigents: appointment of counsel (cf. right to counsel)
错. indigents: inadequate representation by counsel (cf. right to counsel)
者. indigents: payment of fine
认. indigents: costs or filing fees
误. indigents: U.S. Supreme Court docketing fee
接. indigents: transcript
关. indigents: assistance of psychiatrist
重. indigents: miscellaneous
第. liability, civil rights acts (cf. liability, governmental and liability, nongovernmental; cruel and unusual punishment, non-death penalty)
地. miscellaneous civil rights (cf. comity: civil rights)
如. First Amendment, miscellaneous (cf. comity: First Amendment)
设. commercial speech, excluding attorneys
目. libel, defamation: defamation of public officials and public and private persons
开. libel, privacy: true and false light invasions of privacy
事. legislative investigations: concerning internal security only
可. federal or state internal security legislation: Smith, Internal Security, and related federal statutes
要. loyalty oath or non-Communist affidavit (other than bar applicants, government employees, political party, or teacher)
代. loyalty oath: bar applicants (cf. admission to bar, state or federal or U.S. Supreme Court)
小. loyalty oath: government employees
选. loyalty oath: political party
标. loyalty oath: teachers
明. security risks: denial of benefits or dismissal of employees for reasons other than failure to meet loyalty oath requirements
编. conscientious objectors (cf. military draftee or military active duty) to military service
求. campaign spending (cf. governmental corruption):
列. protest demonstrations (other than as pertains to sit-in demonstrations): demonstrations and other forms of protest based on First Amendment guarantees
网. free exercise of religion
万. establishment of religion (other than as pertains to parochiaid:)
最. parochiaid: government aid to religious schools, or religious requirements in public schools
器. obscenity, state (cf. comity: privacy): including the regulation of sexually explicit material under the 21st Amendment
所. obscenity, federal
内. due process: miscellaneous (cf. loyalty oath), the residual code
体. due process: hearing or notice (other than as pertains to government employees or prisoners' rights)
通. due process: hearing, government employees
务. due process: prisoners' rights and defendants' rights
此. due process: impartial decision maker
商. due process: jurisdiction (jurisdiction over non-resident litigants)
序. due process: takings clause, or other non-constitutional governmental taking of property
化. privacy (cf. libel, comity: privacy)
消. abortion: including contraceptives
否. right to die
保. Freedom of Information Act and related federal or state statutes or regulations
使. attorneys' and governmental employees' or officials' fees or compensation or licenses
次. commercial speech, attorneys (cf. commercial speech)
机. admission to a state or federal bar, disbarment, and attorney discipline (cf. loyalty oath: bar applicants)
对. admission to, or disbarment from, Bar of the U.S. Supreme Court
量. arbitration (in the context of labor-management or employer-employee relations) (cf. arbitration)
查. union antitrust: legality of anticompetitive union activity
部. union or closed shop: includes agency shop litigation
性. Fair Labor Standards Act
和. Occupational Safety and Health Act
更. union-union member dispute (except as pertains to union or closed shop)
后. labor-management disputes: bargaining
证. labor-management disputes: employee discharge
题. labor-management disputes: distribution of union literature
确. labor-management disputes: representative election
格. labor-management disputes: antistrike injunction
了. labor-management disputes: jurisdictional dispute
于. labor-management disputes: right to organize
金. labor-management disputes: picketing
公. labor-management disputes: secondary activity
午. labor-management disputes: no-strike clause
円. labor-management disputes: union representatives
片. labor-management disputes: union trust funds (cf. ERISA)
空. labor-management disputes: working conditions
态. labor-management disputes: miscellaneous dispute
管. miscellaneous union
主. antitrust (except in the context of mergers and union antitrust)
天. mergers
自. bankruptcy (except in the context of priority of federal fiscal claims)
我. sufficiency of evidence: typically in the context of a jury's determination of compensation for injury or death
全. election of remedies: legal remedies available to injured persons or things
今. liability, governmental: tort or contract actions by or against government or governmental officials other than defense of criminal actions brought under a civil rights action.
来. liability, other than as in sufficiency of evidence, election of remedies, punitive damages
正. liability, punitive damages
说. Employee Retirement Income Security Act (cf. union trust funds)
意. state or local government tax
送. state and territorial land claims
容. state or local government regulation, especially of business (cf. federal pre-emption of state court jurisdiction, federal pre-emption of state legislation or regulation)
已. federal or state regulation of securities
结. natural resources - environmental protection (cf. national supremacy: natural resources, national supremacy: pollution)
会. corruption, governmental or governmental regulation of other than as in campaign spending
段. zoning: constitutionality of such ordinances, or restrictions on owners' or lessors' use of real property
计. arbitration (other than as pertains to labor-management or employer-employee relations (cf. union arbitration)
源. federal or state consumer protection: typically under the Truth in Lending; Food, Drug and Cosmetic; and Consumer Protection Credit Acts
色. patents and copyrights: patent
時. patents and copyrights: copyright
交. patents and copyrights: trademark
系. patents and copyrights: patentability of computer processes
过. federal or state regulation of transportation regulation: railroad
电. federal and some few state regulations of transportation regulation: boat
询. federal and some few state regulation of transportation regulation:truck, or motor carrier
符. federal and some few state regulation of transportation regulation: pipeline (cf. federal public utilities regulation: gas pipeline)
未. federal and some few state regulation of transportation regulation: airline
程. federal and some few state regulation of public utilities regulation: electric power
常. federal and some few state regulation of public utilities regulation: nuclear power
条. federal and some few state regulation of public utilities regulation: oil producer
当. federal and some few state regulation of public utilities regulation: gas producer
情. federal and some few state regulation of public utilities regulation: gas pipeline (cf. federal transportation regulation: pipeline)
口. federal and some few state regulation of public utilities regulation: radio and television (cf. cable television)
合. federal and some few state regulation of public utilities regulation: cable television (cf. radio and television)
车. federal and some few state regulations of public utilities regulation: telephone or telegraph company
实. miscellaneous economic regulation
组. comity: civil rights
版. comity: criminal procedure
周. comity: First Amendment
址. comity: habeas corpus
记. comity: military
二. comity: obscenity
同. comity: privacy
业. comity: miscellaneous
权. comity primarily removal cases, civil procedure (cf. comity, criminal and First Amendment); deference to foreign judicial tribunals
其. assessment of costs or damages: as part of a court order
进. Federal Rules of Civil Procedure including Supreme Court Rules, application of the Federal Rules of Evidence, Federal Rules of Appellate Procedure in civil litigation, Circuit Court Rules, and state rules and admiralty rules
试. judicial review of administrative agency's or administrative official's actions and procedures
验. mootness (cf. standing to sue: live dispute)
料. venue
传. no merits: writ improvidently granted
述. no merits: dismissed or affirmed for want of a substantial or properly presented federal question, or a nonsuit
集. no merits: dismissed or affirmed for want of jurisdiction (cf. judicial administration: Supreme Court jurisdiction or authority on appeal from federal district courts or courts of appeals)
多. no merits: adequate non-federal grounds for decision
无. no merits: remand to determine basis of state or federal court decision (cf. judicial administration: state law)
员. no merits: miscellaneous
报. standing to sue: adversary parties
他. standing to sue: direct injury
無. standing to sue: legal injury
服. standing to sue: personal injury
线. standing to sue: justiciable question
这. standing to sue: live dispute
制. standing to sue: parens patriae standing
将. standing to sue: statutory standing
处. standing to sue: private or implied cause of action
高. standing to sue: taxpayer's suit
子. standing to sue: miscellaneous
道. judicial administration: jurisdiction or authority of federal district courts or territorial courts
章. judicial administration: jurisdiction or authority of federal courts of appeals
手. judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from federal district courts or courts of appeals (cf. 753)
库. judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from highest state court
三. judicial administration: jurisdiction or authority of the Court of Claims
从. judicial administration: Supreme Court's original jurisdiction
支. judicial administration: review of non-final order
家. judicial administration: change in state law (cf. no merits: remand to determine basis of state court decision)
长. judicial administration: federal question (cf. no merits: dismissed for want of a substantial or properly presented federal question)
付. judicial administration: ancillary or pendent jurisdiction
秒. judicial administration: extraordinary relief (e.g., mandamus, injunction)
路. judicial administration: certification (cf. objection to reason for denial of certiorari or appeal)
完. judicial administration: resolution of circuit conflict, or conflict between or among other courts
象. judicial administration: objection to reason for denial of certiorari or appeal
则. judicial administration: collateral estoppel or res judicata
现. judicial administration: interpleader
京. judicial administration: untimely filing
转. judicial administration: Act of State doctrine
辑. judicial administration: miscellaneous
限. Supreme Court's certiorari, writ of error, or appeals jurisdiction
力. miscellaneous judicial power, especially diversity jurisdiction
学. federal-state ownership dispute (cf. Submerged Lands Act)
外. federal pre-emption of state court jurisdiction
调. federal pre-emption of state legislation or regulation. cf. state regulation of business. rarely involves union activity. Does not involve constitutional interpretation unless the Court says it does.
项. Submerged Lands Act (cf. federal-state ownership dispute)
北. national supremacy: commodities
工. national supremacy: intergovernmental tax immunity
笑. national supremacy: marital and family relationships and property, including obligation of child support
监. national supremacy: natural resources (cf. natural resources - environmental protection)
任. national supremacy: pollution, air or water (cf. natural resources - environmental protection)
相. national supremacy: public utilities (cf. federal public utilities regulation)
微. national supremacy: state tax (cf. state tax)
册. national supremacy: miscellaneous
联. miscellaneous federalism
平. boundary dispute between states
增. non-real property dispute between states
听. miscellaneous interstate relations conflict
解. incorporation of foreign territories
等. federal taxation, typically under provisions of the Internal Revenue Code
得. federal taxation of gifts, personal, business, or professional expenses
收. priority of federal fiscal claims: over those of the states or private entities
安. miscellaneous federal taxation (cf. national supremacy: state tax)
价. legislative veto
藏. executive authority vis-a-vis congress or the states
命. miscellaneous
应. real property
看. personal property
索. contracts
资. evidence
产. civil procedure
串. torts
布. wills and trusts
原. commercial transactions
Answer:

Answer: 主