04454594 is referenced by 304 patents and cites 2 patents.

Apparatus which discourages the use of unauthorized program software with proprietory computer hardware. The computer hardware reads a DATA TABLE from a specified location in separable software and displays the content of that table in human recognizable form. The displayed data is then compared with reference data which is stored in the proprietory hardware. The hardware blocks further execution of programs contained in the separable software if the displayed data and reference data are not congruent. In a preferred embodiment the display is material which can only be legally used with the permission of the manufacturer or proprietory of the hardware; for example; a registered trademark or copyrighted material.

Title
Method and apparatus to secure proprietary operation of computer equipment
Application Number
6/324743
Publication Number
4454594
Application Date
November 25, 1981
Publication Date
June 12, 1984
Inventor
Jack E Haken
Danbury
CT, US
Roberto Lenarduzzi
Knoxville
TN, US
Charles B Heffron
Knoxville
TN, US
Agent
Robert T Mayer
Assignee
U S Philips Corporation
NY, US
IPC
G06F 1/00
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