SCADA web HMI client device and system patent granted
Summary
The USPTO has granted a patent (US12585236B2) to TMEIC CORPORATION for a SCADA web HMI client device and system. The patent, effective March 24, 2026, relates to controlling access and operability of HMI screens based on user access levels and browser permissions.
What changed
The United States Patent and Trademark Office (USPTO) has granted patent US12585236B2 to TMEIC CORPORATION. This patent covers a SCADA web HMI client device and system designed to enhance security by controlling the operability of Human-Machine Interface (HMI) screens. The system ensures that screens are drawn in an operable state only when the user's access level meets or exceeds the required operation access level and browser permissions are granted, otherwise drawing them in an inoperable state.
While this is a patent grant and not a direct regulatory mandate, it signifies a technological advancement in the security of industrial control systems. Companies operating SCADA systems, particularly those in critical infrastructure or manufacturing, should be aware of such patented technologies. This patent may influence future product development and cybersecurity strategies for SCADA web HMI implementations, potentially impacting compliance with evolving cybersecurity standards and best practices for operational technology (OT) environments.
Archived snapshot
Mar 27, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
SCADA web HMI client device and SCADA web HMI system
Grant US12585236B2 Kind: B2 Mar 24, 2026
Assignee
TMEIC CORPORATION
Inventors
Ryo Shimizu, Akira Nojima, Nobuo Shimizu
Abstract
A SCADA web HMI client device comprises a processor and a memory. The memory stores a user access level, image data for an HMI screen, and screen access authority information, all received from a web server. The screen access authority information includes an operation access level of the HMI screen and operation permission/prohibition of the HMI screen by the web browser. The processor draws the HMI screen in an operable state on the web browser in a case where the user access level is greater than or equal to the operation access level and where operation of the HMI screen by the web browser is permitted. The processor draws the HMI screen in an inoperable state on the web browser in a case where the user access level is less than the operation access level or operation of the HMI screen by the web browser is not permitted.
CPC Classifications
H04L 67/12 H04L 41/28 H04L 63/10 H04L 63/083 G06F 21/30 G06F 21/31 G06F 21/62 G06F 21/6218 G06F 21/629 G06F 21/84 G06F 3/048 G06F 3/0481 G06F 3/04847 H04N 1/4433 G09G 2358/00 G06Q 50/04 Y02P 90/02 G05B 19/042 G05B 2219/24215 G05B 2219/31472 G05B 2219/13144 G05B 23/02 G05B 23/0216
Filing Date
2022-03-30
Application No.
18554800
Claims
8
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