Posts Tagged ‘Joanne Hayes-Rines’

Got a Question About the Invention Process? Asktheinventors.com Is Here for You

Posted by Dan Koller
Mary Russell Sarao holds a package of Ghostline poster board. Photo by Michael Samples.

Mary Russell Sarao holds a package of Ghostline poster board. Photo by Michael Samples.

Because Barbara Russell Pitts and Mary Russell Sarao invented Ghostline, a poster board with faint grid lines that guide the user but seem to disappear at …