Firm PROFILE
Lowenstein & Weatherwax LLP
USA 2026
Rankings
Leading firm in USA 2026
Ranked Department
Ranked Department
Top figures
1
Offices
12
Company Size
2012
Established Year
Content provided by Lowenstein & Weatherwax LLP
Overview
Provided by Lowenstein & Weatherwax LLP
Lowenstein & Weatherwax is nationally recognized for representing patent owners in IPRs, reexaminations, Federal Circuit appeals, and district court patent litigation. L&W has handled over 400 IPR/CBM proceedings and nearly 80 Federal Circuit appeals. Patexia ranked Nathan Lowenstein #1 in Patent Owner Performance out of 5,650 PTAB practitioners nationwide for 2020–2025, and ranked L&W the sixth most active and sixth best-performing firm representing patent owners.
Industry sectors (7)
- Semiconductors
- Software
- Telecommunications
- Data security
- Digital video encoding
- WiFi
- Medical Devices
Capabilities (4)
- IPR litigation
- Reexaminations
- Federal Circuit appeals
- District Court litigation
Clients (10)
- VLSI Technology Inc.
- DivX LLC
- Entropic Communications LLC
- MOSAID Technology LLC
- Neural AI, LLC
- QOMPLX LLC
- K.Mizra LLC
- Neo Wireless LLC
- Security First Technologies LLC
- Radian Memory Systems LLC
Key people
Provided by Lowenstein & Weatherwax LLP
Nathan Lowenstein
Managing Partner
Kenneth Weatherwax
Managing Partner
Work & experience
Provided by Lowenstein & Weatherwax LLP
L&W represents patent owners in high-stakes IPRs, reexaminations, Federal Circuit appeals, and district court litigation. The firm is known for exemplary written work product, persuasive oral advocacy, rigorous technical analysis, and strategic judgment. Its boutique model gives clients top-tier advocacy, senior-level attention, and exceptional value in technically complex, high-stakes matters.
Notable work
Provided by Lowenstein & Weatherwax LLP
Entropic Communications LLC
2025OngoingSanta Monica
L&W obtained 14 noninstitutions of IPR petitions brought by Comcast, Dish, and Cox.
Neural AI LLC
2025CompletedSanta Monica
L&W obtained noninstitutions of all four IPR petitions filed by petitioner NVIDIA.
Security First Innovations LLC
2025Ongoing
Obtained four IPR noninstitutions and a reexamination victory
Ranked Offices at Lowenstein & Weatherwax LLP
Provided by Lowenstein & Weatherwax LLP
Ranked Departments at Lowenstein & Weatherwax LLP (1)
Top figures
1
Offices
12
Company Size
2012
Established Year
Content provided by Lowenstein & Weatherwax LLP
What success is built on
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