Background
Weber, Inc. and Provisur Technologies compete in the market for high-speed mechanical slicers used in commercial food-processing plants. Provisur held patents covering automated slicing equipment, and Weber petitioned for inter partes review (IPR) — a Patent Trial and Appeal Board (PTAB) proceeding to challenge the patents’ validity — arguing that several of Provisur’s claims were obvious in light of prior art, including Weber’s own operating manuals for its older slicing machines.
The PTAB denied Weber’s petitions, concluding that the Weber operating manuals did not qualify as “printed publications” under 35 U.S.C. § 102 because they had only been distributed to a small number of customers — roughly ten companies — and were subject to confidentiality restrictions in Weber’s terms and conditions of sale. If the manuals were not prior art, Weber’s obviousness arguments collapsed. Weber appealed, asking the Federal Circuit to rule that the manuals should count as prior art printed publications.
The Court’s Holding
The Federal Circuit reversed. The court reaffirmed that the legal standard for “printed publication” is public accessibility: a reference qualifies if it was “sufficiently accessible to the public interested in the art” such that interested members of the relevant public could locate it through reasonable diligence. The court emphasized that this test does not require widespread distribution or actual knowledge by many people.
Applying that standard, the court found that Weber’s operating manuals were created specifically for dissemination to customers who purchased and operated Weber slicers — precisely the segment of the public interested in the technology. The manuals explained how to assemble, operate, clean, and maintain the machines. The fact that only ten customer companies received them did not make them private documents; each customer was a member of the interested public. And the confidentiality notice embedded in Weber’s standard terms and conditions — a copyright reservation and general intellectual property clause — was not an effective restriction on technical disclosure. It did not prohibit customers from using or sharing the technical information in the manuals, and it was not the kind of enforceable non-disclosure obligation that courts have found sufficient to defeat public accessibility.
The court also reversed the PTAB’s alternative finding that the prior art failed to disclose two claim limitations — the “disposed over” and “stop gate” elements — finding those determinations were unsupported by substantial evidence. The case was remanded for the PTAB to complete the obviousness analysis.
Key Takeaways
- A technical document distributed to even a small number of customers in the relevant industry can qualify as a printed publication and prior art if those customers are members of the “interested public” — no widespread distribution is required.
- Boilerplate copyright and IP-ownership language in terms and conditions is not a meaningful confidentiality restriction; it will not prevent a document from being treated as publicly accessible prior art.
- To keep technical documents out of the prior art, companies need explicit, enforceable non-disclosure agreements — not just general legal language in sales contracts.
- Manufacturers that distribute operating manuals, technical specifications, or product guides to customers may inadvertently create prior art that can be used to challenge their own future patents or invalidate competitors’ patents.
Why It Matters
This decision has significant practical consequences for any company that distributes technical documents — operating manuals, installation guides, maintenance procedures, or product specifications — as part of its normal business operations. The Federal Circuit’s ruling makes clear that such documents can become prior art even when they reach only a handful of recipients and contain standard intellectual property language. For patent prosecutors and portfolio managers, this means that technical materials created years before a patent application may surface in IPR proceedings as invalidating prior art.
For companies on the offensive side of IPR practice, Weber v. Provisur opens up a new category of prior art to search: the opponent’s own customer-facing technical documentation. Operating manuals, service bulletins, and installation instructions produced in discovery or obtained from industry sources may now be potent tools for challenging patent validity. Companies seeking to protect genuinely confidential technical information should use specific, signed non-disclosure agreements rather than relying on boilerplate contract terms.