Posts Tagged: "copy protection"

Canon Seeks Patent on Camouflaged Copy-Forgery Pattern

The featured patent application for this column describes a novel improvement for providing latent-image patterns for protecting secure documents. This system creates more effective watermarks for preventing unauthorized copies that are camouflaged but can transmit important data. We also discuss a series of patent applications for medical devices, including a few upgrades to X-ray imaging devices and a design for a less cumbersome ophthalmologic device for creating an X-ray image of a patient’s eye. Our profile of Canon’s recently issued patents shows a wide range of small improvements to various imaging and printing devices developed by the corporation. One patent protects a new design for copy machines that provides better access for clearing paper jams. Another issued patent protects an inkjet head capable of recycling unused ink droplets escaping the inkjet head. We also discuss a few upgrades to printing software systems, including better methods of storing print job histories while in sleep mode.