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Reverse Overwrite Protection On Display Disclosure Number: IPCOM000066799D
Original Publication Date: 1979-Apr-01
Included in the Prior Art Database: 2005-Feb-20

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Batey, MA [+details]


Reverse overwrite protection is disclosed for a Visual Display Unit (VDU) equipped for normal and reverse keying to prevent reverse keying overwriting normal keying. Logic detects when this is attempted and locks the keyboard.