Bert Reiser’s practice focuses on litigating patent infringement, trade secret, and unfair competition actions in federal and state courts, as well as in the International Trade Commission (ITC).

He is one of the most sought-after ITC practitioners in the country. Starting his career clerking for ITC icon, Chief Judge Paul J. Luckern, Bert has since represented complainants and respondents in over 75 ITC investigations and has tried over 30 cases at the ITC. He is regularly retained to represent clients in ITC enforcement actions and proceedings before U.S. Customs and Border Protection (CBP) to clear redesigns for importation. Bert also has deep experience with worldwide litigation campaigns that involve ITC, U.S. district court, and foreign proceedings.

Bert’s breadth of experience is unparalleled.  He has handled investigations involving, among others, semiconductor technology, medical devices, wireless communications, standards essential patents, automotive technology, LCDs, biometric devices, battery technology, and networking equipment.

He is recognized as a leading lawyer for Section 337 litigation before the ITC and regularly speaks and writes on Section 337 developments and policies.

Bert joined the firm as a partner in 2025. Prior to joining Cleary, Bert founded and built a Band 1 Section 337 practice at an AmLaw 10 multinational law firm.

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Notable Experience (including those prior to joining Cleary)

  • Certain Wi-Fi Routers, Wi-Fi Devices, Mesh Wi-Fi Network Devices, and Hardware and Software Components Thereof; and Certain Wi-Fi Access Points, Routers, Range Extenders, Controllers and Components Thereof: Lead ITC counsel in patent-infringement investigations on behalf of Netgear against TP-Link. In the investigation filed by Netgear secured an initial determination of violation of Section 337 and a recommendation that exclusion and cease and desist orders issue to remedy the violation. The strength of the ALJ initial determination forced settlement of the parties’ dispute on terms highly favorable to Netgear.

  • Certain Semiconductor Devices, Mobile Devices Containing the Same, and Components Thereof: Lead ITC counsel for TSMC, the world’s largest manufacturer of semiconductor products and clear leader in the advanced node processes necessary to power cutting-edge technologies across all industries, in a high-consequence patent infringement investigation brought by Daedalus Prime. Daedalus sought exclusion of TSMC chips from the United States, as well as cease and desist orders barring a range of activities associated with the chips. After extensive pre-hearing litigation, and immediately after the final pre-hearing conference, Daedalus approached TSMC with an offer that resulted in settlement of the dispute.

  • Certain Movable Barrier Operator Systems and Components Thereof: Lead ITC counsel in a patent infringement investigation brought by Overhead Door Company (OHD) against market-leading Chamberlain Inc. OHD won sweeping victory before the ALJ, achieved affirmance of the victory before the Commission, and secured exclusion and cease and desist orders against nearly the entirety of Chamberlain’s product line.

  • Certain Lithium-Ion Batteries, Battery Cells, Battery Modules, Battery Packs, Components Thereof, and Processes Therefor: Lead counsel in a trade secret-based investigation on behalf of Complainant LG Chem against SK Innovation involving cutting-edge electric vehicle battery technologies. Proved widespread spoliation of evidence by SKI and secured a default judgment as a sanction together with issuance of lengthy exclusion and cease and desist orders. Issuance of the remedial orders forced SKI to settle the matter for payments of nearly $2 billion.

  • In the Matter of Certain Thermoplastic-Encapsulated Electric Motors, Components Thereof, and Products and Vehicles Containing Same II (ITC): Represented Honda in multi-patent case filed by Intellectual Ventures. Secured termination of initial investigation for lack of standing. Subsequently secured complete victory on the merits for Honda in the re-filed investigation following an evidentiary hearing.

  • Certain Network Devices, Related Software and Components Thereof (I); Inv. No. 337-TA-944; and Certain Network Devices, Related Software and Components Thereof (II); Inv. No; Inv. No. 337-TA-945: Lead ITC counsel for Arista Network Systems in enforcement and U.S. Customs-related proceedings resulting from investigations brought by Cisco. Replaced original counsel after adverse ITC determinations; developed alternative designs and secured the right to import most of Arista’s product offerings through proceedings before Customs. Further defended in enforcement actions brought in the ITC by Cisco, which settled during pendency of the enforcement actions with Arista’s ability to import secured.

  • Certain Baseband Processor Chips and Chipsets, Transmitter and (Radio) Chips, Power Control Chips, and Products Containing Same, Including Cellular Telephone Handsets: Represented Qualcomm in a patent infringement case regarding cellular service and device industry. Obtained reversal on appeal of ITC remedial order, overturning significant and longstanding Commission precedent in the area of downstream exclusion remedy.

  • Certain Variable Speed Wind Turbines and Components Thereof: Represented Kenetech Windpower Inc. in patent infringement-based investigation under Section 337, securing determination of infringement and issuance of exclusion and cease and desist orders.

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