Nelson v. MillerKnoll — Sixth Circuit Rules Authorization Defeats Bubble Lamp Trademark Claims

Background

George Nelson was one of the most celebrated mid-century furniture designers in America, serving for decades as Design Director of Herman Miller, Inc. (now MillerKnoll). Among his most iconic creations is the Bubble Lamp — a geometric, cloth-covered hanging light fixture that remains a design-world standard to this day. While employed at Herman Miller, Nelson designed the lamps under a verbal royalty arrangement but never registered any trademarks related to them.

After Nelson’s death in 1986, his widow Jacqueline inherited his IP rights. In 2006, she entered into a written royalty agreement with Herman Miller that covered “all Nelson designed products, as to which HMI owns the right to George Nelson designs” — a formulation the company contended conveyed ownership rights, not merely a license. A 2013 Intellectual Property Assignment Agreement transferred Jacqueline’s rights to the George Nelson Foundation (GNF), an entity Herman Miller helped establish. When a furniture company called Modernica registered Bubble Lamp trademarks with the USPTO, GNF sued and settled in 2015 — with Modernica transferring the Bubble Lamp trademarks to Herman Miller. A 2015 Addendum to the royalty agreement then added “Nelson branded lamp products” to the covered items, giving Herman Miller “the sole and exclusive right to manufacture, use, and sell” those lamps worldwide in exchange for a 5% royalty.

The Nelson family challenged all of this. Mico Nelson (George’s son) and others sued MillerKnoll in 2021, alleging the company had surreptitiously stolen the Bubble Lamp IP through manipulation — creating GNF to strip Jacqueline of her rights, inducing a favorable Modernica settlement, and acquiring ownership through the 2015 Addendum that Mico claimed he signed without understanding its ownership implications. The district court granted summary judgment to MillerKnoll on all claims. The Sixth Circuit affirmed.

The Court’s Holding

Writing for the panel, Judge Clay held that MillerKnoll was entitled to summary judgment because the Nelsons had authorized everything they now claimed was infringement. The 2006 Royalty Agreement and 2015 Addendum, read together, unambiguously granted MillerKnoll ownership — not merely a license — over the Bubble Lamp IP. The agreement defined covered products as those “owned” by HMI and expressly gave HMI “the exclusive right, title, and interest to all inventions and designs subject to the Agreement.” Adding the Bubble Lamps via the 2015 Addendum extended those same ownership-conferring terms to the lamps.

On the critical trademark law question, the Sixth Circuit ruled — for the first time in the circuit — that authorization defeats an infringement claim under Lanham Act § 1125(a), which protects unregistered trademarks. Because § 1125(a) requires a showing of likelihood of confusion, and because where the trademark holder authorized another’s use there can be no confusion, authorization is a complete defense. This aligns the Sixth Circuit with the Seventh and Eleventh Circuits.

The court also found ratification as an independent basis: Mico Nelson admitted he learned in 2017 that MillerKnoll was asserting ownership of the Bubble Lamp IP, yet continued accepting millions in royalties. Under Michigan law, a party who discovers alleged fraud but then “affirms the contract by accepting a benefit under it” waives any fraud claim. The cancellation claim also failed for lack of evidence of fraudulent statements to the USPTO.

Key Takeaways

• Authorization defeats § 1125(a) claims: A party who authorizes another’s use of an unregistered trademark cannot later sue for infringement. The Sixth Circuit joins the Seventh and Eleventh Circuits in recognizing this defense under § 43(a) of the Lanham Act.
• Contract terms control over subjective intent: Mico Nelson testified he didn’t intend to convey ownership when signing the 2015 Addendum. Under Michigan law, “the actual mental processes of the contracting parties are wholly irrelevant” — the written terms control.
• Defined terms carry their contract definitions: Even though the Agreements labeled covered products “Licensed Products,” the contract defined that term to mean products owned by HMI, defeating any ambiguity between licensing and ownership.
• Accepting royalties after discovering disputed ownership = ratification: Continuing to cash royalty checks after learning of the ownership dispute bars subsequent fraud and tort claims under Michigan law.
• Trademark cancellation demands clear and convincing fraud evidence: Conclusory expert opinion on another party’s state of mind is insufficient to survive summary judgment on a § 1119 cancellation claim.

Why It Matters

This decision carries two important dimensions. The first is the design-IP dispute itself: the George Nelson Bubble Lamp is among the most recognized pieces of mid-century American design, and the ruling definitively confirms MillerKnoll’s ownership of the Bubble Lamp trademarks — a question that had been contested for years. Companies licensing or purchasing designer IP should note how carefully the court parsed ownership vs. licensing language; even a “Royalty Agreement” can be read to convey full IP ownership if its terms support that reading.

The second is the precedential trademark ruling: by holding that authorization defeats unregistered trademark infringement claims under § 1125(a), the Sixth Circuit fills a gap in circuit law and strengthens the hand of defendants who can show they had the IP holder’s blessing. For brand licensees, franchise operators, and anyone using a mark under a commercial agreement, this ruling makes clear that a valid authorization agreement is a powerful shield against infringement liability — even where the marks were never formally registered.