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Canon Knowledge Base - Scanning Both Sides of a Document Using the ADF (macOS) - TR7520 / TR8520 / TR8620
Fujitsu Fi-7030 Sheetfed Color Duplex Professional Document Scanner 97564308857 | eBay
Plustek PS30D Duplex Document Scanner: with 50 Sheet Auto Document Feeder (ADF) and searchable PDF Function by Abbyy OCR. Support Mac and PC - Walmart.com
Duplex Combo Scanner
Kodak Scan Station 500 Network Duplex Scanner | eBay
Duplex (two-sided) scan | Brother
Amazon.com: Duplex Medical Insurance Card and ID Card Scanner (w/Scan-ID LITE, for Windows) : Office Products
Visioneer RoadWarrior 4D Mobile Duplex Scanner RW4D-U B&H Photo