This educational guide is based on the linked primary sources. It is not a Court publication, is not affiliated with the Court, and is not legal advice.
In brief
Overview
According to Bruce E. Johnson, the case concerns whether patents on corn plant varieties are invalid because Congress created a separate statutory scheme – the Plant Variety Protection (PVP) system – to protect such living things.
Background and question before the Court
Appearances were made by Bruce E. Johnson for the petitioners, Edmund J. Sease for the respondent, and Lawrence G. Wallace, Deputy Solicitor General, for the United States as amicus curiae.
According to Justice, justices asked several questions, including whether the rights conferred by the Plant Variety Protection statute differ from those of the patent statute, and whether a farmer who replants saved seed would infringe the patent.
What each side argues
Petitioner – J.E.M. AG SUPPLY, INC., DBA FARM ADVANTAGE INC.
According to Bruce E. Johnson, the patents on the corn plant varieties are invalid because Congress enacted a specific statutory scheme (the Plant Variety Protection Act) to govern protection of such living things.
Respondent – PIONEER HI‑BRED INTERNATIONAL, INC.
According to Edmund J. Sease, congress intended the Plant Variety Protection statute to regulate the right to exclude others from sexually multiplying plant varieties, not to intervene in ordinary seed marketing.
According to Edmund J. Sease, the Plant Variety Protection system requires disclosure of breeding history, a requirement that does not exist for utility patents.
According to Edmund J. Sease, the respondent asserts that the plaintiff’s activities constitute infringement of the utility patent.
According to Edmund J. Sease, the respondent notes that a party can obtain permission to use the patented seed by paying a licensing fee.
According to Mr. Sease, utility patent protection is critically important in the seed industry because seeds can be easily copied through self‑replication.
Amicus – United States (Deputy Solicitor General Lawrence G. Wallace)
According to Lawrence G. Wallace, the Court’s prior discussion in Diamond v. Chakrabarty highlighted the central role of the Plant Patent Act and the Plant Variety Protection Act in debates over plant‑related intellectual property.
What happened at oral argument
According to Bruce E. Johnson, petitioner’s counsel argued that the patents are invalid because Congress created a distinct statutory scheme for plant varieties.
According to Edmund J. Sease, respondent’s counsel emphasized that the Plant Variety Protection statute was intended to protect the right to exclude others from sexually multiplying plant varieties, not to regulate seed marketing.
According to Justice, justices questioned whether the rights under the Plant Variety Protection statute differ from those under the patent statute and whether a farmer who replants saved seed would infringe the patent.
What the Court decided
Why it matters
Terms to know
No glossary terms are available for this guide.
Primary sources
Read the source materials on the official site or open the immutable repository copy used for this guide.
- 63acdd4471bd7160bb2f-r1-a6f14db4cf364d5a.pdforal argument transcript
Guide generated September 19, 2026. Automated validation accepted this version.