Brett Mangrum

Cherry Johnson Siegmund James PLLCLocal

General

Experience15 yrs

Elite Ratings

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Practice Areas

Chemical (3 cases)

Comp. Arch. and Software (109 cases)

Software, Security (95 cases)

Communications (293 cases)

Semicond., Optic (43 cases)

Law Firms

Cherry Johnson Siegmund James PLLC (Current)

Niloc USA I NC

Mangrum Law Group

Etheridge Law Group

Uniloc

bmangrum@cjsjlaw.com

Ratings

Experience

Grade

Trend

DCT

L4

E

PTAB

L5

E

CAFC

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Cases

Case #	Court	Caption	Filed	Represent
2:26-CV-00532	E.D. TX	Ensygnia IP Ltd v. Samsung Electronics America Inc	07/01/26	Patent Owner :Ensygnia IP Ltd	.
7:26-CV-00231	W.D. TX	Acoustic Array Tech LLC v. Apple Inc	06/12/26	Patent Owner :Acoustic Array Technologies LLC	.
2:26-CV-00472	E.D. TX	Omni MedSci Inc v. OnePlus Technology Shenzhen Co Ltd	06/12/26	Challenger :OnePlus Technology Shenzhen Co Ltd	.
2:26-CV-00453	E.D. TX	Crude Solutions Ltd v. MEG Energy Corp	06/08/26	Patent Owner :Crude Solutions Ltd	.
2:26-CV-00390	E.D. TX	Qosound IP Innovations LLC v. Samsung Electronics Co Ltd	05/11/26	Patent Owner :Qosound IP Innovations LLC	.
2:26-CV-00355	E.D. TX	Tonal Systems Inc v. Shenzhen Speediance Living Technology Co Ltd	05/01/26	Challenger :Shenzhen Speediance Living Technology Co Ltd	.
7:26-CV-00113	W.D. TX	Causam Enterprises Inc v. Jupiter Power LLC	03/27/26	Patent Owner :Causam Enterprises Inc	.
7:26-CV-00080	W.D. TX	Nextech Semiconductor LLC v. Advanced Micro Devices Inc	03/06/26	Patent Owner :Nextech Semiconductor LLC	.
7:26-CV-00079	W.D. TX	Nextech Semiconductor LLC v. Micron Technology Inc	03/06/26	Patent Owner :Nextech Semiconductor LLC	.
7:26-CV-00058	W.D. TX	UNM Rainforest Innovations v. NXP Semiconductors NV	02/19/26	Patent Owner :UNM Rainforest Innovations	.

Ratings Trends

Practice Areas