On this day in 1888, American inventor Theophilus Van Kannel was granted a patent for the revolving door.See <a href="https://omnystudio.com/listener">omnystudio.com/listener</a> for privacy information.

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.

On this day in 1888, American inventor Theophilus Van Kannel was granted a patent for the revolving door.See <a href="https://omnystudio.com/listener" rel="noopener noreferrer">omnystudio.com/listener</a> for privacy information.

Theophilus Van Kannel patents the revolving door - August 7th, 1888

From the desk of “Stuff You Missed in History Class,” “This Day in History Class” quickly recounts a tidbit from today’s events in history.

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Theophilus Van Kannel patents the revolving door - August 7th, 1888

Theophilus Van Kannel patents the revolving door - August 7th, 1888