Boots – shoes – and leggings
Patent
1984-09-14
1987-02-17
Heckler, Thomas M.
Boots, shoes, and leggings
380 22, G06F 900
Patent
active
046444939
ABSTRACT:
Method and apparatus which restricts software, distributed on magnetic media, to use on a single computing machine. The original medium is functionally uncopyable, until it is modified by the execution of a program stored in a tamper proof co-processor which forms a part of the computing machine. The modified software on the original medium may then be copied, but the copy is operable only on the computing machine containing the co-processor that performed the modification.
REFERENCES:
patent: 4168396 (1979-09-01), Best
patent: 4246638 (1981-01-01), Thomas
patent: 4465901 (1984-08-01), Best
patent: 4558176 (1985-12-01), Arnold et al.
patent: 4573119 (1986-02-01), Westheimer et al.
patent: 4577289 (1986-03-01), Comerford et al.
Chandra Akhileshwari N.
Comerford Liam D.
White Steve R.
Arnold Jack M.
Heckler Thomas M.
International Business Machines - Corporation
Mills John G.
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