Lowe v. Shieldmark: Supreme Court Denies Cert on Floor Marking Tape Patent
Clifford A. Lowe sought Supreme Court review of a patent infringement dispute against Shieldmark, Inc. over US10214664B2, a patent covering floor marking tape. The petition was denied in just 26 days — one of the fastest dispositions possible at the Court’s highest level.
A Floor Tape Patent Battle Ends at the Supreme Court’s Door
Clifford A. Lowe filed a certiorari petition with the U.S. Supreme Court on November 19, 2025, seeking review of an infringement dispute against Shieldmark, Inc. The case concerned US10214664B2, a patent protecting floor marking tape technology used widely in industrial and commercial facility environments. Shieldmark, an Ohio-based competitor in the floor marking space, was named as the respondent. Lowe was represented by Renner, Kenner, Greive, Bobak, Taylor & Weber, LPA, and Shieldmark by Sand Sebolt & Wernow LPA.
The Supreme Court denied the petition on December 15, 2025 — just 26 days after filing. A denial of certiorari is not a ruling on the merits; the Court offers no explanation, and the denial simply allows the decision of the court below to stand as final and binding. For Lowe, this closes the federal judicial avenue for the infringement claim. Shieldmark retains its position established in the lower proceedings, with no further appellate exposure on this matter from this filing.
A 26-day petition lifespan is consistent with summary disposition, suggesting the petition may have been denied without full briefing from the respondent — a common occurrence when the Court finds no circuit split or question of exceptional importance warranting review. The public record does not disclose the underlying claim construction disputes or the lower court’s specific findings, leaving open questions about the technical scope of the patent’s enforceability as established below.
Filing to Petition Dismissed in 26 days
26 days — among the shortest possible Supreme Court petition lifespans
Supreme Court denies cert: what the ruling means for both parties
Cert denied: no merits ruling, lower decision stands
A denial of certiorari by the U.S. Supreme Court is not a judgment on the merits of the patent dispute. The Court simply declines to hear the case, leaving the lower court’s decision undisturbed. This is the most common Supreme Court outcome — the Court accepts fewer than 2% of petitions. It does not signal agreement or disagreement with the lower ruling; it signals only that four Justices did not vote to grant review.
Procedural — no merits adjudicationLowe’s enforcement path is exhausted at the federal level
With the petition denied, Clifford A. Lowe has no further avenue for federal appellate review of this infringement dispute. The lower court’s disposition — whether a finding of non-infringement, invalidity, or otherwise — is now final. Lowe retains ownership of US10214664B2 and could theoretically pursue new infringement claims if Shieldmark introduces products outside the adjudicated scope, but the current dispute is closed.
Enforcement path closedShieldmark’s position is confirmed; no further exposure on this claim
For Shieldmark, the cert denial is a definitive win in this proceeding. The company faces no further appellate risk from this filing. The lower court’s findings in Shieldmark’s favour are now the final word on the contested infringement questions. This outcome may strengthen Shieldmark’s commercial position in the floor marking tape market, though it does not necessarily resolve the patent’s validity for future enforcement against other parties.
Respondent position confirmedFloor marking IP landscape: cert denial raises enforcement uncertainty
The denial leaves the lower court’s claim construction or invalidity findings as the controlling precedent for US10214664B2, which may affect how broadly the patent can be enforced against other floor marking tape manufacturers. Competitors and distributors operating in the industrial floor marking space should note that the patent remains in force but its enforceability scope is now shaped by the unchallenged lower court record.
Monitor patent scope post-denialFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Clifford A. Lowe | Individual | Independent patent holder — inventor and assignee of US10214664B2, floor marking tapeSearch in Eureka ↗ |
| Defendant | Shieldmark, Inc. | Company | Shieldmark, Inc. — floor marking tape manufacturer and accused infringerSearch in Eureka ↗ |
| Plaintiff counsel | Ray L. Weber | Attorney | Counsel for Clifford A. LoweSearch in Eureka ↗ |
| Plaintiff law firm | Renner, Kenner, Greive, Bobak, Taylor & Weber, LPA | Law Firm | Representing Clifford A. LoweSearch in Eureka ↗ |
| Defendant counsel | James Francis McCarthy III | Attorney | Counsel for Shieldmark, Inc.Search in Eureka ↗ |
| Defendant law firm | Sand Sebolt & Wernow LPA | Law Firm | Representing Shieldmark, Inc.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | U.S. Supreme CourtSearch in Eureka ↗ |
Official order — verbatim text
The Supreme Court’s one-line ‘Petition DENIED’ carries no explanatory reasoning — this is standard practice and should not be read as an endorsement of the lower court’s reasoning or outcome. The denial is purely procedural: it reflects the Court’s discretionary decision that the case does not present a legal question of sufficient national importance. The lower court’s decision on US10214664B2 is now final and binding between these parties. For patent practitioners, the rapid 26-day denial is consistent with a case disposed at conference without calling for a response from the respondent.
US10214664B2 — Floor Marking Tape Technology
US10214664B2, filed under application number US14/747905, protects innovations in floor marking tape — the adhesive tape products used to delineate safety zones, pathways, and work areas in warehouses, factories, and commercial facilities. The patent’s claims likely cover specific structural or adhesive characteristics that differentiate it from commodity floor tape. As an issued utility patent with a B2 designation, it represents a patent that has undergone examination and at least one round of post-issuance proceedings or correction.
Floor marking tape occupies a competitive, high-volume industrial consumables segment. Patent protection in this space typically centres on durability, adhesion profile, substrate composition, or installation mechanics. US10214664B2 gives its holder a potential enforcement tool against manufacturers offering functionally similar products. However, with the Supreme Court cert denial leaving lower court findings intact, the practical enforcement scope of this patent is now constrained by the claim constructions and validity determinations made at that level — a critical consideration for any party evaluating licensing or FTO risk.
Should you run an FTO against US10214664B2 for floor marking tape products?
Any manufacturer, distributor, or OEM operating in the industrial floor marking tape space — including warehouse safety products, facility marking systems, or adhesive tape for 5S and lean manufacturing environments — should assess exposure to US10214664B2. The patent remains in force despite the litigation outcome. The cert denial means the lower court’s claim scope findings are final, but those findings are party-specific and do not automatically clear third-party products. New entrants and product line extensions should treat this patent as an active risk.
PatSnap Eureka’s FTO Search Agent can map the claim landscape of US10214664B2 against your product specifications, identify the claim elements most likely to be asserted, and surface relevant prior art that may support design-around or challenge strategies. Given that the lower court proceedings have now shaped the patent’s enforceability contours, an Eureka-powered FTO analysis can help R&D and legal teams quickly assess whether their floor tape product architectures fall within or outside the adjudicated claim scope.
Run a freedom-to-operate analysis on US10214664B2 to assess your product’s exposure
Run FTO in Eureka →Similar Floor Marking Tape & Industrial Adhesive Patent Cases
Explore related patent infringement cases involving floor marking tape, industrial adhesive products, and facility safety marking technology at U.S. federal courts.
What this case signals for the industrial floor marking IP landscape
A cert denial after 26 days suggests the patent community and the Court saw no broad legal question — but the stakes for floor tape IP remain real.
Cert denial at 26 days signals absence of circuit split argument
The Supreme Court’s rapid disposition — consistent with a conference-level summary denial — suggests Lowe’s petition likely did not present a compelling circuit split or constitutional patent question. For practitioners, this is a reminder that cert petitions in niche product patent cases rarely survive without a clear split among federal circuits or a question of nationwide significance.
US10214664B2 remains in force but with bounded enforcement scope
The patent covering floor marking tape is not invalidated by this outcome. However, the lower court’s unappealed findings now define its practical enforcement ceiling. Any future licensee negotiation or infringement action involving this patent will be shaped by those findings, making a thorough review of the lower court record essential for any party in the floor marking tape supply chain.
Lowe v Shieldmark — key questions answered
The cert denial means the Supreme Court declined to review the case, leaving the lower court’s decision final. It is not a ruling on the merits of the floor marking tape patent dispute. US10214664B2 remains in force, but its enforceability is now bounded by the lower court’s unappealed findings on claim scope or validity.
Yes, the patent remains in force. A cert denial does not invalidate a patent. However, the lower court’s specific findings — whether on infringement, claim construction, or validity — are now the controlling authority for this patent as between these parties. Third parties should conduct independent FTO analysis rather than relying solely on this case’s outcome.
A 26-day petition lifespan is consistent with summary denial at the Court’s regular conference, sometimes without requiring a response from the respondent. This typically suggests the petition did not present a circuit split, a question of constitutional importance, or a conflict with a Supreme Court precedent — the three main criteria the Court applies when selecting cases for review.
The public record for the Supreme Court petition (Case No. 25-596) does not specify the lower court proceedings. The case originated as an infringement action concerning US10214664B2. Practitioners seeking the full procedural history should search the lower federal court dockets associated with the parties and patent number.
US10214664B2 is a U.S. utility patent covering floor marking tape technology — adhesive tape products used to mark safety zones, traffic lanes, and work boundaries in industrial and commercial facilities. Filed under application US14/747905, it is the subject of the infringement dispute between inventor Clifford A. Lowe and Shieldmark, Inc., a manufacturer in the floor marking space.
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