Smoking Facts

Seemed odd to me that the ad would not only mention that they've got "a patent on flavor," but also give the patent number (3828800). So I had to look it up. Turned out to be a fairly boring patent for "an improved cigarette filter material... formed from the porous, granular salt of a weakly basic anion exchange resin."

Sports Illustrated - Nov 14, 1977

Coos Bay World - Nov 4, 1978