I thought I would continue with the theme of early aviators on stamps. This stamp shows Glenn Curtiss. Issued by the the United States Postal Service on December 30, 1980, to honor the aviation pioneer Glenn Curtiss. Curtiss was an aircraft designer and manufacturer. He is well known for his invention and development of the what???? and for his design and production of the first successful seaplanes and amphibious airplanes. Yes, what was it he invented? I thought maybe time for another quiz. Send me your answer to cddstamps@gmail.com with your mailing address please, and you will win something aviation / philatelic related if you are the first correct answer.