Can anyone id this light pen? "http://www.intellistar.net/~rigdonj/misc/lpen.jpg". It looks like it was built into the body of a standard ink pen. The components on the circuit board are covered with a black tar looking substance giving the board a bumpy look. There is a male card edge connector sticking out of the reverse side on the circuit board. There is a label on the pen that says "3G Gaston, Or. (503) 662-4492". Joe