Brulotte v. Thys Co.
Headline: Blocks patent-holders from collecting royalties after patent expiration, reversing lower court and preventing companies from extending patent monopolies through post-expiration royalty agreements, freeing users and markets after patents end.
Holding:
- Bars patent owners from collecting royalties tied to use after patent expiration.
- Prevents licensing terms from extending patent monopoly beyond the patent term.
- Protects farmers and buyers from post-expiration royalty demands on patented machines
Summary
Background
Two farmers bought hop-picking machines from a company that owned patents on the machines. They paid a flat sum and received licenses requiring annual royalties: at least $500 per season or $3.33 per 200 pounds of hops, whichever was greater. The licenses listed many patents but only seven were actually used in the machines; those seven patents expired by 1957 while the license terms continued. The buyers stopped paying royalties that accrued after the patents expired, and the company sued. Lower courts upheld the company's right to collect.
Reasoning
The Court asked whether a patent owner can use a royalty agreement to keep collecting payments tied to machine use after the patent term ends. Relying on the Constitution’s grant of limited patent rights and federal patent law, the Court said patents become public property when they expire. It found the licenses kept the same restrictions and royalties before and after expiration, including limits on assignment and removal, and concluded that projecting patent leverage beyond the patent term unlawfully extends the patent monopoly. The Court therefore held such post-expiration royalties unlawful per se and reversed the judgment to prevent collection of royalties accruing after patent expiration.
Real world impact
Farmers and other users of patented machines cannot be forced to pay royalties for periods after the patents included in their machines have expired. Sellers and patent owners must not use licensing terms to continue monopoly controls once patents enter the public domain. This ruling affects sales and licensing practices but leaves open lawful sales or financing arrangements that do not rely on patent leverage.
Dissents or concurrances
A dissent argued the case involved mixed sale and patent elements and that extended payments tied to use should be analyzed differently; that Justice would have upheld the arrangements between the company and buyers.
Opinions in this case:
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