The article "Gear Greenbacks" appeared in the September/October 2004 issue of Gear Technology.
Imagine the $10 bill with the face of Edwin R. Fellows on it and on the back, a picture of his invention: the gear shaping machine. Or the $5 bill with George B. Grant and a picture of the first hobbing machine, which he built.
The article "Gear Greenbacks" should appear in the box below, but if you do not see it, you can download it here.