Re: First draft of Stepping Stones

From: Douglas W. Jones <jones_at_cs_dot_uiowa_dot_edu>
Date: Mon Dec 13 2004 - 15:53:44 CST

On Dec 13, 2004, at 10:38 AM, Edmund R. Kennedy wrote:

> Fine by me.  I have been realizing that this is a guide to software
> development.  However, we do need an over all clear view of the system
> we want to plug components in.  For the ballot design, I've been
> wondering if the registration bars on the scanner are proprietary. 
> Does anyone know if there is some sort of copyright or patent?

The basic registration bar idea for scanners is probably covered by
Lindquist's patents on mark-sense scanners. These patents were assigned
to Westinghouse Learning Corporation during the late 1950's and through
the 1960's. IBM's mark-sense scanners of the 1940s era didn't use
timing or registration bars, they used dead reckoning and made strong
assumptions about paper media stability (hence the requirement for
punched card stock).

                Doug Jones

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Received on Fri Dec 31 23:17:12 2004

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