17 Dec
2003
17 Dec
'03
11:17 p.m.
s1018954@aix2.uottawa.ca writes:
Sorry if this has been stated before, but exactly when do Chaum's first set up e-cash related patents expire? I looked it up in applied crypto the last time I had my hands on it and couldn't find the dates.
How many (and what) patents are there in this field anyway? (don't bother with that if it's too long to answer)
I did a patent search a few months ago, with results at <URL: http://www.portal.com/~hfinney/chaum_patents.html>. Chaum has several patents; my lists doesn't have all of them. The ones I have are dated 1988 and 1990. Hal