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Article #74685Re: Backing store patent and X
From: John Henders
Date: Fri, 01 Mar 1991 17:25
Date: Fri, 01 Mar 1991 17:25
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In article <4862@archive.BBN.COM> rnewman@bbn.com writes: > >Many of the DEC people who helped MIT produce X Version 11 formerly >worked at Xerox SDD during the late 1970's and early 1980's. It's >not surprising that the "bitmap under" concept found its way into X. >AT&T is crazy if they think they invented it. > Does anyone know the date of this patent, as it seems there are lots of examples of "prior art" around? The technique is so similar to games programming tricks, I'm sure someone must have published it somewhere before the patent. John Henders Vancouver,B.C.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 1025b4,1b253318bf044b49 X-Google-Attributes: gid1025b4,public X-Google-ArrivalTime: 1991-03-01 12:52:11 PST Path: arc1-ca.pugleaf.net!gmdzi!unido!fauern!ira.uka.de!sol.ctr.columbia.edu!spool.mu.edu!sdd.hp.com!wuarchive!uunet!shelby!agate!ucbvax!van-bc!jhenders From: jhenders@van-bc.wimsey.bc.ca (John Henders) Newsgroups: gnu.misc.discuss Subject: Re: Backing store patent and X Message-ID: <2419@van-bc.wimsey.bc.ca> Date: 1 Mar 91 17:25:46 GMT References: <ERU.91Feb25203738@tnvsu1.tele.nokia.fi> <4862@archive.BBN.COM> Organization: USENET Public Access, Vancouver, B.C., Canada Lines: 15