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Charles B Heffron, Roberto Lenarduzzi, Jack E Haken: Method and apparatus to secure proprietary operation of computer equipment. U S Philips Corporation, Robert T Mayer, June 12, 1984: US04454594 (304 worldwide citation)

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 wit ...


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Charles B Heffron: Video game device with automatic standby mode. North American Philips Consumer Electronics, Thomas A Briody, William J Streeter, Marianne Rich, April 1, 1986: US04579338 (13 worldwide citation)

A video game device for use with a conventional television receiver includes microprocessor-based game control circuitry for generating audio and video signals in accordance with a series of digital instructions contained in a removable game cartridge. A signal provided by an RF generator within the ...


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