Susan,
I would love to know more about your great-grandfather's work in designing the Johnson & Johnson logo, if you have any stories you would like to share. Our logo is based on the signature of one of our founders, James Wood Johnson, and actually goes back to the late 1800s. We have products and ads in our archives going back to 1888 with the distinctive Johnson & Johnson logo. Here's a post from a few years ago about the origins of the Johnson & Johnson logo: http://www.kilmerhouse.com/2008/05/does-this-mans-handwriting-look-familiar-to-you/
Regards,
Margaret