Custom Product Name & Specified COM Port Technology
PL2303GC Patented OEM Deployment Technology
Patented Technology
Custom Product Name & Specified COM Port Technology
Factory-configured, device-bound identity for streamlined OEM deployment.
Taiwan Invention Patent No. I934369 | U.S. Patent Application Publication US20260169944A1 – Pending | China Patent Application Publication CN122220280A – Pending
Factory-Configured. Device-Bound. Easy to Identify.
A Clear Product Name for Every Specified COM Port.
Program once during manufacturing. The configured Product String and Specified COM Port Number stay with the device, helping users immediately recognize which COM port belongs to which product while reducing end-user COM port reassignment and manual Device Manager setup.
PL2303GC allows an OEM to program a customized, descriptive Product String and a Specified COM Port number into OTPROM / EEPROM during manufacturing. Instead of presenting several identical generic COM-port names, Windows Device Manager can present product-specific names that make each serial device easier to identify at a glance. The product identity is provisioned at the device side before shipment, allowing the configured identity to travel with the product and reducing routine end-user COM reassignment or manual Device Manager setup.
Video Demonstration
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Make Every COM Port Immediately Recognizable
When multiple USB-to-UART devices use the same generic description, users may see several nearly identical entries and must remember which COM number belongs to which product. PL2303GC lets the OEM program a descriptive multilingual Product String together with a Specified COM Port number, so each device can be identified by purpose at a glance.
Typical Generic Display
Prolific USB to Serial COM Port (COM3)
Prolific USB to Serial COM Port (COM3)
Prolific USB to Serial COM Port (COM3)
Prolific USB to Serial COM Port (COM3)
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PL2303GC Product-Specific Display
Prolific 1st Floor Main Entrance Access Card (COM11)
Prolific B1 Parking Garage Access Card (COM22)
Prolific 公司7樓印表機 (COM33)
Prolific 公司7樓收銀機 (COM44)
Benefit: the user can immediately tell which COM port represents which physical product. The examples above are illustrative; the actual displayed Product String and Specified COM Port number are defined by the OEM configuration and supported driver environment.
Specified COM Port: 1-65,535Program the intended COM Port number during production so each product can use a predictable, OEM-selected port identity.
Clear, Descriptive Product NameStore an OEM-defined multilingual Product String in OTPROM / EEPROM so Windows Device Manager can present an obvious product-specific name instead of several identical generic COM-port labels.
Product Name + COM Port PairingThe programmed Product String and Specified COM Port Number are stored with the device, helping users associate each COM port with the correct product at a glance.
No End-User COM Port ReassignmentFor supported deployments, the intended COM Port identity can be established during manufacturing instead of requiring routine manual reassignment after shipment.
Same Prolific Windows VCP DriverDifferent OEM product identities can be created through device-side configuration while using the same Prolific driver platform.
Reduced Deployment & Certification OverheadFor these OTPROM / EEPROM settings, the PL2303GC datasheet states that no additional WHQL submission and related fee are required.
1. Factory Provisioning
Program a descriptive Product String + Specified COM number into OTPROM / EEPROM.
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2. Device-Bound Identity
The programmed product identity remains with the PL2303GC-based device.
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3. Clear at Deployment
Windows Device Manager presents the configured product name together with the Specified COM number, helping users identify the correct serial device without routine end-user COM reassignment.
| Jurisdiction | Status | Patent / Application Publication |
|---|---|---|
| Taiwan | GRANTED | Taiwan Invention Patent No. I934369 |
| United States | PATENT PENDING | U.S. Patent Application Publication No. US20260169944A1 |
| China | PATENT PENDING | China Patent Application Publication No. CN122220280A |
Patent Notice: Certain customized product-name, serial-port identity, and Specified COM Port functions are protected by Taiwan Invention Patent No. I934369. Corresponding patent applications in the United States and China are pending. Patent-pending status does not indicate that a patent has been granted in those jurisdictions. Last Updated: August 21, 2026