Patents in suit

US 7,714,726 Semi-transparent RFID tags

7 defendants · 7 suits · updated September 14, 2026

Also cited as U.S. Patent No. 7,714,726 · US7714726B2 · US 7,714,726 B2 · 7714726 · the '726 patent

NetMomentum LLC has filed 7 patent-infringement suits on US 7,714,726, "Semi-transparent RFID tags" since July 27, 2026, all in the E.D. Tex., against 7 distinct defendants including BenQ Corporation, Coolpad Group Limited and MilDef International AB. The patent was granted May 11, 2010 on a priority date of May 6, 2005. Its abstract opens: "A “semi-transparent” antenna and Radio Frequency (RF) device implementing the same." The examiner cited 15 references during prosecution.

Assignee
Netmomentum LLC
Priority date
May 6, 2005
Granted
May 11, 2010
Expires
May 6, 2025
Status
Active
Claims
127 (3 independent)
Inventors
Roger Green Stewart
Full text
Google Patents

The suits

7 cases · E.D. Tex. (7)

Filed Defendant Plaintiff Court Docket
2026-07-27 BenQ Corporation NetMomentum LLC E.D. Tex. 2:26-cv-00611
2026-07-27 Coolpad Group Limited NetMomentum LLC E.D. Tex. 2:26-cv-00612
2026-07-27 MilDef International AB NetMomentum LLC E.D. Tex. 2:26-cv-00614
2026-07-27 Portwell, Inc. NetMomentum LLC E.D. Tex. 2:26-cv-00615
2026-07-27 TSC Auto ID Technology Co., Ltd. NetMomentum LLC E.D. Tex. 2:26-cv-00616
2026-07-27 Twinhead International Corporation NetMomentum LLC E.D. Tex. 2:26-cv-00617
2026-07-31 Newline Interactive Inc. NetMomentum LLC E.D. Tex. 2:26-cv-00652

Docket links open the public record on CourtListener. Filing dates are the complaint's.

Independent claims

What is actually asserted, verbatim.

Claim 1

1. A Radio Frequency (RF) device, comprising: a circuit; and an antenna coupled to the circuit, wherein the antenna minimally affects electromagnetic RF fields surrounding the antenna even in the vicinity of the antenna.

Claim 61

61. A Radio Frequency (RF) device, comprising: a circuit; and an antenna coupled to the circuit, wherein the antenna minimally affects electromagnetic RF fields surrounding the antenna even in the vicinity of the antenna, wherein the antenna has a sheet resistivity of at least about 1 Ω/sq, wherein at least 50% of the RF energy striking the antenna passes through the antenna.

Claim 101

101. A wirelessly readable assembly of objects, comprising: a plurality of objects arranged in close proximity to each other, each object having a Radio Frequency (RF) device coupled thereto, each RF device comprising: a circuit; and an antenna coupled to the circuit, wherein the antenna minimally affects electromagnetic RF fields surrounding the antenna, wherein the circuit is capable of communicating with a remote device via RF signals.

Art before the examiner

28 references of record, 15 cited by the examiner.

Everything listed here was before the Office and is what a challenge must go beyond. Art the examiner never saw is where an invalidity search starts.

Examiner-cited

  • US3967161A — A multi-frequency resonant tag circuit for use with an electronic security system having improved noise discrimination (Lichtblau G J)
  • US5521601A — Power-efficient technique for multiple tag discrimination (International Business Machines Corporation)
  • US6243012B1 — Inexpensive modulated backscatter reflector (Lucent Technologies Inc.)
  • US6271793B1 — Radio frequency (RF) transponder (Tag) with composite antenna (International Business Machines Corporation)
  • US6329915B1 — RF Tag having high dielectric constant material (Intermec Ip Corp)
  • US20030180451A1 — Low viscosity copper precursor compositions and methods for the deposition of conductive electronic features (Kodas Toivo T.)
  • US6745008B1 — Multi-frequency communication system and method (Battelle Memorial Institute K1-53)
  • US6754368B1 — Object recognition and tracking system (Beonic Corporation Pty. Ltd)
  • US6838989B1 — RFID transponder having active backscatter amplifier for re-transmitting a received signal (Intermec Ip Corp.)
  • US6891466B2 — Broad bandwidth, high impedance transponder for electronic identification system (Christopher Gordon Gervase Turner)
  • US20050104956A1 — Imaging device, information storage server, article identification apparatus and imaging system (Fuji Photo Film Co., Ltd.)
  • US6940466B2 — Enhanced magnetic field communication system (Starkey Laboratories, Inc.)
  • US6970089B2 — Full-spectrum passive communication system and method (Battelle Memorial Institute K1-53)
  • US6995655B2 — Method of simultaneously reading multiple radio frequency tags, RF tags, and RF reader (Battelle Memorial Institute)
  • US7286043B2 — System and method for inventorying multiple remote objects (Battelle Memorial Institute K1-53)
Applicant-cited and other (13)
  • US5519381A — Detection of multiple articles
  • US5822714A — Data processing system and method for accessing a plurality of radio frequency identification tags
  • US5963144A — Cloaking circuit for use in a radiofrequency identification and method of cloaking RFID tags to increase interrogation reliability
  • US6034603A — Radio tag system and method with improved tag interference avoidance
  • US6147606A — Apparatus and method for radio frequency transponder with improved read distance
  • US6281794B1 — Radio frequency transponder with improved read distance
  • US6377203B1 — Collision arbitration method and apparatus for reading multiple radio frequency identification tags
  • US6400274B1 — High-performance mobile power antennas
  • US6424263B1 — Radio frequency identification tag on a single layer substrate
  • US6466131B1 — Radio frequency data communications device with adjustable receiver sensitivity and method
  • US20040203185A1 — Medium having data storage and communication capabilities and method for forming same
  • US20050052283A1 — Method and apparatus for multiple frequency RFID tag architecture
  • US20050065861A1 — Systems and methods for configuring a warehouse for tracking the location of items within a controlled area

Classification

  • G06K19/07773primary — Antenna details
  • H01Q1/2225primary — Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
  • G06K19/047 — Constructional details the record carrier being shaped as a coin or a gambling token
  • G06K19/0702 — Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement including a battery
  • G06K7/10316 — Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers

Family

  • US7714726B2 — B2 (2010)
  • US20100182130A1 — A1 (2010)
  • US11126908B2 — B2 (2021)
  • US20210390363A1 — A1 (2021)
  • US11861442B2 — B2 (2024)
  • US20170032240A1 — A1 (2017)
  • US8576078B2 — B2 (2013)
  • US20060250251A1 — A1 (2006)
  • US20240135135A1 — A1 (2024)
  • US20140034732A1 — A1 (2014)
  • US9477918B2 — B2 (2016)
  • 2 foreign family members: WO2006121502A3, WO2006121502A2

Abstract

A “semi-transparent” antenna and Radio Frequency (RF) device implementing the same. The semi-transparent antenna gathers some of the RF energy in a carrier signal, but most of the energy in the RF wave does not couple into the antenna. Accordingly, because the antenna minimally affects the electromagnetic RF fields surrounding the antenna even in the vicinity of the antenna, assemblies of objects carrying the RF devices can be formed while maintaining acceptable communications with the RF devices.

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This page is assembled from public records — federal court dockets and the patent's own file — and is updated as the case list changes. It states what the record shows and is not an opinion on the validity or infringement of any claim. Patent data via Google Patents; docket data via CourtListener.