
13.4 The Commercialization COP
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basic method that Bennett invented without heaping on unnecessary limitations
as to the specic forms the apparatus may take, whether the signals are sent on
an optical ber or through free space, what kind of detector is used, whether you
need a laser, and so on.
Another thing to note about this patent is that you can’t purchase a commercial
QKD system from IBM like you can an IBM mainframe. at is not unusual;
IBM patents many inventions that it does not use or embody in its products.
Infact, IBM manufactures and sells and leases (licenses) patents as a separate
line of business and is very good at it—to the ...