The OneTouch 7400 Driver from Visioneer is another USB flatbed scanner which is no longer manufactured much like the Visioneer Road Warrior 2 on this website. The drivers for the Visioneer One Touch 7400 has been listed below for downloading. Note that these are only the Twain drivers.
The Visioneer OneTouch 7400 USB scans images at up to 1200 dpi and 48-bit internal color. Note that it is/was a USB 2.0 powered and compatible with 1.1 ports with no external power needed. These are the Microsoft Windows 8, 7, Vista and XP (SP2) certified TWAIN and WIA drivers for the scanner.