At 11:34 PM 2/20/00 -0400, Dan Moniz wrote:
>This may show some of the area where I haven't done enough homework on
>the issue, but has anyone asked Chaum what his feelings are? Is he still
>the principal patent holder, or was any of it under DigiCash (and thus
>now under eCash Technologies)?
I'm posting this to cypherpunks, with a courtesy cc: to coderpunks, because
I don't think that legal and patent issues are on-topic for coderpunks. I
suggest that further discussion continue on cypherpunks (or at least
somewhere else).
The following US patents were listed among the assets in the bankruptcy of
Digicash Incorporated - I have added projected expiration dates, using 17
years from date of issue, except where the full term was disclaimed
(5,276,736). I expect they are now the property of whoever purchased the
assets of the corporation, although I haven't looked at the bankruptcy
filings to be sure.
5781631 Limited-traceability systems (14 Jul 2015)
5712913 Limited-traceability systems (27 Jan 2015)
5493614 Private signature and proof systems (20 Feb 2013)
5485520 Automatic real-time highway toll collection from moving vehicles
(16 Jan 2013)
5434919 Compact endorsement signature systems (18 Jul 2012)
5373558 Designated-confirmer signature systems (13 Dec 2011)
5276736 Optionally moderated transaction systems (14 Jul 2009)
5131039 Optionally moderated transaction systems (14 Jul 2009)
4996711 Selected-exponent signature systems (26 Feb 2008)
4991210 Unpredictable blind signature systems (5 Feb 2008)
4987593 One-show blind signature systems (22 Jan 2008)
4949380 Returned-value blind signature systems (14 Aug 2007)
4947430 Undeniable signature systems (7 Aug 2007)
4926480 Card-computer moderated systems (15 May 2007)
4914698 One-show blind signature systems (3 Apr 2007)
4759064 Blind unanticipated signature systems (19 Jul 2005)
4759063 Blind signature systems (19 Jul 2005)
4529870 Cryptographic identification, financial transaction, and credential
device (16 Jul 2002)
--
Greg Broiles
[EMAIL PROTECTED]
