Task: songer_casetyp1_7-3-1

What follows is an opinion from a United States Court of Appeals.
Your task is to identify the issue in the case, that is, the social and/or political context of the litigation in which more purely legal issues are argued. Put somewhat differently, this field identifies the nature of the conflict between the litigants. The focus here is on the subject matter of the controversy rather than its legal basis.
Your task is to determine the specific issue in the case within the broad category of "economic activity and regulation - taxes, patents, copyright". 

PER CURIAM.
Chemithon Corporation, holder of United States patents 3,024,258 and 3,-058,920, for making synthetic detergents, brought this action against Procter & Gamble Company, charging infringement of its patents and misappropriation of its trade secrets. P & G challenged the validity of the patents and sought attorneys’ fees under 35 U.S.C. § 285.
The district court held that P & G used the processes claimed by the patents for more than a year before Chemithon filed its applications, and that its use was public within the meaning of 35 U.S.C. § 102(b). Consequently, the court held the patents invalid. It also held that P & G had not misappropriated Chemithon’s trade secrets, but it denied P & G’s request for attorneys’ fees. In reaching these conclusions the district judge applied correct principles of law to findings of fact that are amply supported by the evidence. Finding neither error nor abuse of discretion, we affirm on the opinion of the district court. Chemithon Corp. v. Procter & Gamble Co., 287 F.Supp. 291 (D.Md.1968).
Affirmed.

Question: What is the specific issue in the case within the general category of "economic activity and regulation - taxes, patents, copyright"?
A. state or local tax
B. federal taxation - individual income tax (includes taxes of individuals, fiduciaries, & estates)
C. federal tax - business income tax (includes corporate and parnership)
D. federal tax - excess profits
E. federal estate and gift tax
F. federal tax - other
G. patents
H. copyrights
I. trademarks
J. trade secrets, personal intellectual property
Answer:

Answer: G