A Blog About Intellectual Property Litigation and the District of Delaware


Entries for tag: Contention Interrogatories

It was tough to find an image for this. Just imagine each lego head is a proposed claim construction.
It was tough to find an image for this. Just imagine each lego head is a proposed claim construction. Wu Yi, Unsplash

The District of Delaware supports contention interrogatories generally (but not contention 30(b)(6) topics). I remember that, back before the Court adopted the Default Standard in 2011, contention interrogatories were the main way to define and limit the scope of the case during fact discovery.

But contention interrogatories are not without limits. On Friday, in LeFebvre v. Extrabux, Inc., C.A. No. 23-167 (D. Del.), Judge Burke issued a decision on a discovery dispute about a contention interrogatory seeking claim construction positions. He held that a party can't just ask the opposing party for its …

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Chiara F, Unsplash

I thought I'd share an old transcript that has come in handy a number of times since it issued back in 2013, where Judge Andrews made a helpful ruling about how and when patentees must respond to conception date interrogatories—an issue that comes up frequently.

In Vehicle Interface Techs., LLC v. Jaguar Land Rover N. Am., LLC, C.A. No. 12-1285-RGA (D. Del.), the defendant filed a discovery dispute to compel a full response to an interrogatory asking for the date of conception and reduction to practice.

The patentee had responded, but the answer was not very helpful. According to the discovery dispute letter:

[The patentee] stated that the sole inventor . . …