Background
Hormel Foods Corporation holds U.S. Patent No. 9,980,498, which claims a two-step method for cooking bacon: first, preheating and partially cooking meat pieces using a heat source, then finishing them in a superheated steam oven. The patent was directed to a specific approach to commercial bacon precooking that Hormel developed.
HIP, Inc. sued Hormel, claiming that David Howard of HIP was a joint inventor of the ‘498 patent because he had disclosed an infrared preheating concept to Hormel engineers in 2007 — years before Hormel filed the patent. HIP argued that the infrared preheating concept Howard shared was incorporated into claim 5 of the patent, making Howard a co-inventor. After a bench trial, the district court agreed and ordered correction of inventorship under 35 U.S.C. § 256 to add Howard as a joint inventor. Hormel appealed.
The Court’s Holding
The Federal Circuit reversed. The court applied the three-part Pannu test for joint inventorship, which requires that a purported co-inventor: (1) contributed to the conception of the claimed invention; (2) made a contribution that was not insignificant in quality when measured against the full scope of the invention; and (3) did more than merely explain well-known concepts or the prior art. The court found that Howard’s contribution failed the second factor: even if Howard had communicated the idea of infrared preheating to Hormel, that concept was not the novel or significant element of the claimed invention.
The court emphasized that the inventive concept in Hormel’s patent was not the use of preheating per se — preheating meat before a secondary cooking step was already a known technique. The patent’s novelty lay in the specific combination and configuration of cooking steps, particularly the use of superheated steam in the second stage and the overall process design for commercial bacon production. Howard’s alleged contribution — a general idea of using infrared heat as a preheating step — was neither novel nor a significant conceptual contribution when viewed against the full scope of what was actually claimed. Without meeting the significance threshold, Howard could not qualify as a joint inventor.
Key Takeaways
- To qualify as a joint inventor, a person must contribute to the conception of the invention in a way that is “significant in quality” when measured against the full scope of the invention — suggesting a known technique or conventional step is not enough.
- Contributing a concept that was already well-known in the field — even if the named inventor incorporated it — does not make someone a joint inventor; co-inventors must contribute something beyond what was already part of the prior art.
- The Pannu test’s second factor is a meaningful hurdle: courts will examine whether the alleged contribution was actually the novel, inventive element of the claim or merely an obvious or known component.
- Inventorship disputes often arise in commercial relationships — like supplier/customer interactions — where ideas are shared informally; parties should document what technical information is shared and in what form to avoid later disputes.
Why It Matters
HIP v. Hormel clarifies the line between a true co-inventor and someone who shared a conventional or known idea that ended up in a patent. Patent law does not reward every person who shared relevant information with an inventor; only those who contributed something genuinely new and significant to the conception of the claimed invention can claim co-inventor status. This matters practically for suppliers, consultants, and service providers who share technical ideas with their customers or partners: if the idea they share is already well-known in the field, they cannot later claim inventorship even if their suggestion influenced the final product.
For companies that develop and patent technologies using input from external partners or vendors, this decision provides some protection against broad inventorship claims by parties who contributed known or obvious elements. But it also underscores the importance of keeping clear records of what technical information is received from outside parties and ensuring that any significant inventive contributions are properly recognized and documented at the outset.