AIM Manufacturing v. Parasol Medical: 9-Patent Pressure-Injury Device Dispute Dismissed
AIM Manufacturing, LLC filed suit against Parasol Medical, LLC in the Southern District of Illinois asserting 9 patents covering pressure-injury prevention mattresses, overlays, and recliner cushions including the AIM Hybrid and Wiggle product lines. The case was voluntarily dismissed without prejudice just 90 days after filing, before any answer or summary judgment motion was served.
A 9-patent pressure-injury mattress dispute that vanished in 90 days
On 12 July 2024, AIM Manufacturing, LLC and co-plaintiff Inspired Innovations LLC filed an infringement action against Parasol Medical, LLC in the Southern District of Illinois before Judge Martha M. Pacold. The complaint asserted nine United States patents — US10388143B2, US10674940B2, US10806377B2, US10799153B2, US10722146B2, US11160472B2, US10499834B2, US10997847B2, and US10470689B2 — covering pressure-injury prevention mattresses, overlays, and recliner cushions, including the AIM Hybrid, AIM Mattress, AIM Prevent, AIM Recliner Cushion, and the Wiggle product range.
On 10 October 2024, the plaintiffs filed a notice of voluntary dismissal without prejudice pursuant to Fed. R. Civ. P. 41(a)(1)(A)(i), citing that no answer or motion for summary judgment had been served by Parasol Medical. Rule 41(a)(1)(A)(i) permits a plaintiff to dismiss as of right — without court approval — at any time before the opposing party serves either an answer or a summary judgment motion. The dismissal was entered against all defendants and the case was closed the same day.
The 90-day lifespan suggests the dispute was resolved — or strategically paused — well before the litigation entered substantive motion practice. The public record does not disclose whether the parties reached a licensing arrangement, a commercial settlement, or whether AIM Manufacturing intends to refile. Because the dismissal is without prejudice, all nine patents remain fully available for future enforcement, and the underlying infringement allegations have not been adjudicated on the merits.
Filing to Voluntary dismissal in 90 days
90-day case lifespan — well below the district average for patent infringement actions
Voluntarily dismissed: what the Rule 41 exit means for both parties
Rule 41(a)(1)(A)(i): a dismissal as of right
Fed. R. Civ. P. 41(a)(1)(A)(i) allows a plaintiff to dismiss an action without court order before the defendant serves an answer or summary judgment motion. Because Parasol Medical had not yet served either, AIM Manufacturing could exit unilaterally. No judicial approval was required, and no merits ruling was made. The procedural posture confirms this was a very early-stage exit — the case never progressed to substantive briefing.
No merits ruling enteredWithout prejudice confirmed — but refile intent is unknown
The notice expressly states ‘voluntarily dismissed without prejudice,’ meaning AIM Manufacturing retains the full legal right to bring the same infringement claims again. A dismissal with prejudice would permanently bar refiling; this one does not. However, the public record is silent on whether a private settlement, licensing deal, or commercial resolution accompanied the dismissal. The distinction matters: without prejudice preserves optionality, but it does not confirm an intent to refile.
Refile right preservedParasol Medical exits without a binding ruling — for now
Parasol Medical faces no injunction, no damages award, and no finding of infringement. The absence of an answer on the record suggests the parties may have engaged in early settlement or licensing discussions. However, the without-prejudice dismissal means all nine asserted patents remain active enforcement tools. Parasol Medical’s products — including any that competed with the AIM Hybrid or Wiggle lines — remain subject to potential future suit on the same patent portfolio.
No infringement findingNine live patents over pressure-injury prevention — sector remains on notice
The breadth of the asserted portfolio — nine granted patents spanning mattresses, overlays, and recliner cushions — signals a structured IP programme around pressure-injury prevention technology. Competitors in this medical device segment should treat this dismissal as a pause, not a clearance. The portfolio covers application numbers dating from 2014 through 2019, suggesting layered, continuation-style protection. Any company manufacturing or commercialising similar products should consider freedom-to-operate analysis against this portfolio.
Portfolio enforcement risk persistsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | AIM Manufacturing, LLC | Company | Medical device innovator — holder of US10388143B2 and 8 further pressure-injury prevention patentsSearch in Eureka ↗ |
| Defendant | Parasol Medical, LLC | Company | Parasol Medical, LLC — medical device company accused of infringing 9 pressure-injury prevention patentsSearch in Eureka ↗ |
| Plaintiff counsel | Brian Patrick McGraw | Attorney | Counsel for AIM Manufacturing, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Matt Phillip Dearmond | Attorney | Counsel for AIM Manufacturing, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Robert J. Theuerkauf | Attorney | Counsel for AIM Manufacturing, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Gray Ice Higdon PLLC | Law Firm | Representing AIM Manufacturing, LLCSearch in Eureka ↗ |
| Presiding judge | Judge Martha M. Pacold | Judge | Illinois Southern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice invokes Rule 41(a)(1)(A)(i) and confirms no answer or summary judgment motion had been served — placing this squarely in the as-of-right dismissal category requiring no judicial intervention. The phrase ‘without prejudice against all defendants’ is legally significant: it preserves every cause of action and every asserted patent for future proceedings. No claim construction, no validity ruling, and no infringement finding appears anywhere in the record, meaning neither party gains a substantive legal position from this termination.
US10388143B2 and 8 further patents — pressure-injury prevention mattress and overlay systems
The nine asserted patents — with application numbers ranging from US14/171319 (filed 2014) to US16/545081 (filed 2019) — form a layered portfolio covering pressure-injury prevention devices including powered hybrid mattresses, non-powered overlays, and recliner cushions. The granted patent numbers (US10388143B2 through US11160472B2) span a multi-year prosecution window consistent with a continuation-based prosecution strategy designed to capture evolving product generations. The technical domain sits at the intersection of medical device engineering, foam material science, and patient monitoring.
For competitors in the hospital and long-term care equipment segment, this portfolio represents a structured IP barrier around the pressure-injury prevention product category. The inclusion of both powered (AIM Hybrid) and non-powered (Wiggle Non-Powered Mattress, Wiggle Non-Powered Overlay) product variants in the accused product list suggests the patent claims are drafted broadly enough to cover a range of commercial implementations. Any manufacturer or distributor of pressure-redistributing mattresses, overlays, or therapeutic cushions should treat this portfolio as an active enforcement risk regardless of the current dismissal.
Should you run an FTO against the AIM Manufacturing pressure-injury patent portfolio?
Any company designing, manufacturing, or distributing pressure-injury prevention mattresses, medical overlays, or therapeutic recliner cushions should treat this nine-patent portfolio as a live FTO priority. The without-prejudice dismissal does not extinguish any patent rights. Products in the hybrid mattress, foam overlay, and patient-positioning cushion categories are directly implicated by the accused product list in this case. The application priority window from 2014 to 2019 means granted patents are likely in force through the late 2030s.
PatSnap Eureka’s FTO Search Agent can map your product’s technical features against all nine asserted patents simultaneously, identify claim elements that overlap with your design, surface prior art that may support invalidity arguments, and flag any related pending applications in the same priority family. For medical device product teams preparing a new mattress or overlay for commercialisation, a structured FTO against this portfolio is a material risk-management step before market launch.
Run a freedom-to-operate analysis on US10388143B2 to assess your product’s exposure
Run FTO in Eureka →Similar pressure-injury prevention medical device patent infringement cases
Explore related patent infringement actions involving pressure-injury prevention mattresses and medical overlays litigated in Illinois and comparable district courts.
What this case signals for the pressure-injury prevention device IP landscape
A 90-day dismissal across a 9-patent portfolio rarely signals defeat — it more typically signals leverage achieved outside the courtroom.
Early voluntary dismissals in medical device cases often reflect licensing outcomes
When a patent plaintiff dismisses without prejudice before the defendant has even answered, it frequently suggests that the filing itself achieved its commercial objective — whether a licensing agreement, a design-around commitment, or a distribution arrangement. The 90-day timeline here is consistent with that pattern, though the public record does not confirm it.
Nine-patent portfolios signal a deliberate IP-moat strategy, not opportunistic filing
Asserting nine patents across mattress, overlay, and recliner cushion categories in a single complaint is consistent with a portfolio owner seeking to establish comprehensive freedom to enforce. R&D leaders and product teams in the pressure-injury prevention segment should audit their product designs against the full AIM/Inspired Innovations portfolio, not just the lead patent.
AIM v Parasol — key questions answered
The case was dismissed without prejudice. AIM Manufacturing filed a voluntary dismissal notice under Fed. R. Civ. P. 41(a)(1)(A)(i) on 10 October 2024, expressly stating ‘without prejudice against all defendants.’ This preserves AIM’s right to refile the same claims in the future.
AIM Manufacturing and co-plaintiff Inspired Innovations LLC asserted nine US patents: US10388143B2, US10674940B2, US10806377B2, US10799153B2, US10722146B2, US11160472B2, US10499834B2, US10997847B2, and US10470689B2. The patents cover pressure-injury prevention mattresses, overlays, and recliner cushions.
The accused products included the AIM Hybrid, AIM Mattress, AIM Prevent, AIM Recliner Cushion, Wiggle Foam Mattress, Wiggle Non-Powered Mattress, and Wiggle Non-Powered Overlay — covering both powered and non-powered pressure-injury prevention product categories.
The public record does not disclose the reason. The 90-day timeline and the fact that Parasol Medical never served an answer are consistent with an early commercial resolution such as a licensing agreement or settlement, though this has not been confirmed. The without-prejudice dismissal suggests the plaintiff chose to preserve its enforcement options rather than permanently abandon the claims.
No. A voluntary dismissal without prejudice under Rule 41(a)(1)(A)(i) has no effect on patent validity or enforceability. No court made any ruling on claim construction, infringement, or validity. All nine asserted patents remain granted, in force, and available for future enforcement proceedings.
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