Path: utzoo!attcan!uunet!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!wuarchive!texbell!chinacat!woody
From: woody@chinacat.Unicom.COM (Woody Baker @ Eagle Signal)
Newsgroups: comp.lang.postscript
Subject: Re: Color separations
Summary: patent pending
Message-ID: <1208@chinacat.Unicom.COM>
Date: 2 May 90 04:30:35 GMT
References: <263DD7CE.1C19@intercon.com>
Organization: a guest of Unicom Systems Development, Austin
Lines: 33

In article <263DD7CE.1C19@intercon.com>, amanda@mermaid.intercon.com (Amanda Walker) writes:
> 
> The second article was one that I found more fascinating.  It described
> a scheme [patent pending, unfortunately :-(] that, instead of generating

Remember that when a patent is applied for and issued, it has to include
enough information that anyone reasonably skilled in the art can reproduce
it.  A Patent gives the company the right to sue if someone else trys to
make money with the patent.  There is nothing to prevent you from using
any patent and making the item, as long as it is for your own personaly
use, and you don't transfer it, sell it or give it away.  You can sell
COPIES of the Patents (they are Public Domain)...If the patent is
assigned to the government (Anything invented by any government employee
or civil servant is automaticaly assigned to the government), you may
do what you want.  In that case, the government automaticaly grants
a royalty free license for use by anyone.

Cheers
Woody


> four screens at angles that minimize moire patterns, generates four screens
> at the same angle but offset from each other.  This is something you can
> do on an imagesetter but not with traditional photographic halftones (since
> you can control the registration as well).  They claim it looks much better
> than using rotated screens, especially on lower-resolution devices (like
> 300 dpi printers, although why you'd do seps at 300 dpi is beyond me).
> 
> --
> Amanda Walker, InterCon Systems Corporation
> --
> "Y'know, you can't have, like, a light, without a dark to stick it in...
>  You know what I'm sayin'?"     --Arlo Guthrie