SUMMAGRAPHICS CONTENDS PATENT SUIT INVALID
<Summagraphics Corp> said the
patent infringement suit filed by Lockheed Corp's <LK> Sanders
Rogers Associates unit is invalid.
    Summagraphics said it will seek an injunction to stop
Sanders from continuing with its suit.
    The company said prior to Sanders filing a patent for an
electromagnetic digitizing apparatus, it was working with
technology that was patented and subsequently reflected in the
Rogers patent.
 Reuter
