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US 6,144,319 AGranted
Anti-surveillance device for keyboards
AssigneeInternational Business Machines Corporation
InventorsHeinz Lutz, Peter Schmidt
Life of this patent
Estimating the term…
Abstract
An anti-surveillance device for keyboards, particularly for the keyboards of cash dispensing machines or electronic cash devices, in order to prevent unwanted viewing of the keyboard from the side. The invention comprises at least one anti-surveillance filter (3), preferably exhibiting a lamellar or lamellar-grid structure, where only the lamellae consist of opaque material and where the anti-surveillance filter (3) is disposed above the keyboard (5).
Claims12
An anti-surveillance keyboard comprising:
- a keyboard defining an entry region, and
- an anti-surveillance filter mounted at a fixed distance above the entry region of the keyboard, the fixed distance being such that operation of the keyboard is possible and viewing of the keyboard from a position beside the keyboard is precluded, wherein said fixed distance is at least sufficient for a user to operate said keyboard using a space between said filter and said keyboard.
Dependencies are inferred from the claim text.