This question has been addressed in 1 Texas court opinion:
COA09 — February 20, 2026
In re Mitsubishi Heavy Industries America, Inc. involved a discovery dispute where a relator sought to shield alleged trade secrets from production. The Beaumont Court of Appeals analyzed the burden-shifting framework of Texas Rule of Evidence 507 and the procedural requirements of Rule of Civil Procedure 193.3, concluding that the relator provided only general categorical descriptions of documents rather than a specific privilege log. The court held that the relator's failure to affirmatively request an in-camera inspection prevented the trial court from making a reasoned determination on the privilege, thereby rendering the petition for mandamus relief premature.
Litigation Takeaway
“To successfully protect trade secrets or proprietary business information in discovery, you must do more than simply object; you must provide a detailed privilege log and formally request an in-camera inspection. Failing to provide the trial court with the specific documents for review waives your ability to seek mandamus relief, as the appellate court cannot find an abuse of discretion without a record of the specific evidence at issue.”