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From: tim@ism780c.UUCP (Tim Smith)
Newsgroups: sci.crypt,comp.misc
Subject: Re: Silly patents
Message-ID: <7347@ism780c.UUCP>
Date: Mon, 21-Sep-87 16:25:53 EDT
Article-I.D.: ism780c.7347
Posted: Mon Sep 21 16:25:53 1987
Date-Received: Wed, 23-Sep-87 02:21:39 EDT
References: <Lots> <1608@gryphon.CTS.COM>
Reply-To: tim@ism780c.UUCP (Tim Smith)
Organization: Interactive Systems Corp., Santa Monica CA
Lines: 20
Keywords: /2, Red unicycles, crosshair cursors
Xref: mnetor sci.crypt:557 comp.misc:1277

richard@gryphon.CTS.COM (Richard Sexton) writes:
< Somebody (was it Vectrix) has patented XOR crosshair cursors. Now,
< dont tell me people were using them them before this patent, I know
< that.

I was told when I was programming video games for the Mattel Intellivision
that Philips had a patent that covered the detection of on screen collisions
of video objects by AND gates.

This was claimed to be the reason that the game that was included with the
Intellivision did not use moving objects ( it was entirely done with
backgound graphics ).  The idea was that if Philips decided to sue,
they would not be able to get an injunction banning the sales of the
Intellivision itself, only individual games that they know used that
technology.
-- 
Tim Smith, Knowledgian		{sdcrdcf,uunet}!ism780c!tim
				tim@ism780c.isc.com
"Oh I wish I were Matthew Wiener, That is who I truly want to be,
 'Cause if I were Matthew Wiener, Tim Maroney would send flames to me"