Editing Flexagon (section)

=== Attempted commercial development ===
In 1955, Russell Rogers and Leonard D'Andrea of [[Homestead, Pennsylvania|Homestead Park, Pennsylvania]] applied for a patent, and in 1959 they were granted U.S. Patent number 2,883,195 for the hexahexaflexagon, under the title "Changeable Amusement Devices and the Like."

Their patent imagined possible applications of the device "as a toy, as an advertising display device, or as an educational geometric device."<ref>{{cite web |url=http://www.freepatentsonline.com/2883195.pdf |archive-url=https://web.archive.org/web/20110614011049/http://www.freepatentsonline.com/2883195.pdf |archive-date=2011-06-14 |url-status=live |title=Changeable amusement devices and the like |website=Freepatentsonline.com |first1=Russell E. |last1=Rogers |first2=Leonard D. L. |last2=Andrea |id=U.S. Patent 2883195 |date=April 21, 1959 |access-date=January 13, 2011}}</ref> A few such novelties were produced by the [[Herbick & Held Printing Company]], the printing company in [[Pittsburgh]] where Rogers worked, but the device, marketed as the "Hexmo", failed to catch on.