Even when plaintiffs know of the potential weak spots in their infringement cases, they sometimes fail to address DOE until too late, or they offer a DOE analysis so weak that it gets excluded or wiped out by summary judgment.
That's what happened last week, when Chief Judge Stark struck a DOE opinion after a plaintiff tried to squeak by on the idea that its late DOE argument should be permitted because it never affirmatively disclaimedDOE:
Arendi's passing reference to DOE in its complaints followed by its lack of affirmative disclaimer of DOE theories (see, e.g., C.A. No. 12−1595 D.I. 238 at 5) ("Arendi has never asserted that its claims were limited to literal infringement") does …
There's not a lot of space in a discovery dispute letter to get into the real nitty gritty of the dispute. You've gotta put in the standard, say the word "Pennypack" 20 or 30 times, and work in the phrase "flies in the face of" at least once.
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A recent opinion from Judge Burke, however, illustrates the folly of briefing disputes in this way, even if it is satisfying.
The defendant in Attentive Mobile Inc. v. Stodge Inc., C.A. No. 23-87, D.I. 400 (D. Del. Oct. 16, 2024) moved for a protective order to prevent the depositions of two employees. The opening letter apparently got quite into the weeds about the nature …
We don't often write about claim construction opinions, because they can be very fact-specific. But Judge Hall's opinion yesterday in Apple Inc. v. Masimo Corporation, C.A. No. 22-1377-JLH (D. Del.) included some generally applicable points worth noting.
Sometimes a Reservation of Rights Actually Works
There's a reason we've all seen countless discovery documents, disclosures, expert reports, and briefs that are larded up with endless reservations of rights: sometimes they work!
This is one of those times. The patentee (Apple) had filed a response to invalidity contentions regarding a design patent in an IPR. In it, Apple described the scope of its patent, but included a reservation stating that it wasn't taking claim …
Here's a scenario that can happen in a patent case: The patentee serves an opening expert report alleging infringement. Your expert responds, detailing every reason why the design documents show non-infringment. The patentee then serves a reply expert report, citing new documents that it says show infringement.
What do you do now? There are at least four answers: (1) move for leave to serve a sur-reply report to address the new docs; (2) just serve a sur-reply report, without leave, and fight the inevitable motion to strike; (3) skip the report but have the expert be prepared to discuss the new papers at deposition, and hope plaintiff asks; or (4) just plan to address the new …
"Please, dear Court, don't strike our new argument that totally prejudices the other side."Lampos Aritonang, Unsplash
It can sometimes be tough to decide whether to ask the Court permission, or to just do something. The answer can vary depending on the thing you are doing and the judge.
But certain things clearly require permission. Say, for example, offering a "supplemental" expert report with a new damages calculation almost two years after the reply expert report, and only 19 days before trial:
There is no dispute that MED-EL failed to disclose Barry Sussman’s most recent damages calculations based on survey results (set forth in Paragraph 11 of his Supplemental Expert Rebuttal Report) during the expert disclosure period. Indeed, the …
The doctrine of equivalents is often treated as the legal equivalent of going "c'mon....c'mon! its all the same."
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It's not uncommon to see it included in infringement contentions in terms that just note that, to the extent the noodlewiggler (TM) does not literally infringe claim 38 of of the '123 patent, it's insubstantially different, and performs the same function in the same way to achieve the same result, and is lame."
Judge Andrews issued an opinion today that neatly illustrates the problem with that tactic. The defendant in Carrum Techs., LLC v. Ford Motor Comp. C.A. No. 18-1647-RGA (D. Del. Nov. 9, 2023) (Mem. Op.) moved for summary judgment on the basis of a …
Ouch. This week in MED-EL Elektromedizinische Geräte Ges.m.b.H. v. Advanced Bionics LLC, C.A. No. 18-1530-JDW (D. Del. Oct. 30, 2023), Judge Wolson addressed a motion in limine to exclude testimony from both of the accused infringer's witnesses on their prior use defense.
The accused infringer didn't offer expert testimony at all on invalidity, according to the briefing. D.I. 399 at 3. Instead, it asserted a prior use defense in its contentions, presumably intending get it in through fact witness testimony.
The patentee first moved in limine to preclude the defense due to a lack of expert testimony. But the Court held that a party can present an invalidity defense without it—and compared the motion to an improper SJ motion:
The first part of AB’s Motion In Limine #1 is a summary judgment motion in disguise. MED-EL asserts invalidity in this case. If AB had a basis to argue that the absence of expert testimony dooms that claim, then it should have moved for summary judgment on the issue. It didn’t, and it can’t use an in limine motion to dispose of MED-EL’s claim. If AB believes that the lack of expert testimony means that MED-EL cannot meet its burden, then AB can seek relief under Rule 50 at the close of MED-EL’s case at trial.
(We've talked before about the risks of bringing what should be an SJ motion as a MIL.)
In other words, offering no expert testimony could be OK. The accused infringer, however, also failed to ...
Judge Burke had an interesting opinion on Tuesday striking final contentions served after the deadline in the scheduling order.
It's become increasingly common in the district for late-served final contentions to be analyzed under the less forgiving good cause standard of Rule 16 without reference to thePennypack Factors. Even so, it was a bit surprising to see the Court strike contentions which were filed just a month after the deadline, which the Court addressed directly in the Order:
This result might seem harsh in light of the facts here, since Plaintiff submitted the belated contentions at issue only about a month after the filing deadline called for by the Scheduling Order. …
We've talked before about how asserting invalidity based on system prior art (as opposed to written publications, for example) can be tricky, because accused infringers can face all kinds of sometimes-unexpected difficulties with proving up the prior art.
Parties often get into sticky evidentiary questions about exactly what kinds of evidence are sufficient to show that the relevant prior art was on sale before the priority date, and how the prior art functioned—and whether that all of that evidence has authenticity or hearsay issues.
On Friday, Magistrate Judge Burke issued a long oral report and recommendation to grant summary judgment of no invalidity based on a system prior art reference. In the case, the defendants relied …
Back in September we wrote about how Judge Andrews rejected an expert who relied on a 50/50 starting point to show damages in a patent case. We noted at the time that the defendant had moved to strike any follow-up theory by the plaintiff, and it wasn't clear that the Court had ruled on it before trial began.
Now we know what actually happened. Yesterday, the Court released its opinion on the motion to strike. In its opinion, the Court explained that after the plaintiff lost its damages expert, the plaintiff tried to "cobble together" a damages theory from various facts on the Friday before trial. The Court struck that new theory:
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