Theophilus Van Kannel patents the revolving door - August 7th, 1888 - a podcast by iHeartRadio & HowStuffWorks

On this day in 1888, American inventor Theophilus Van Kannel was granted a patent for the revolving door.

See omnystudio.com/listener for privacy information.

Further episodes of This Day in History Class

Further podcasts by iHeartRadio & HowStuffWorks

Website of iHeartRadio & HowStuffWorks