This patent started the era of shape-shifting furniture - This Day in Patent History

PatentYogi_This Day in Patent History_Aug 15

On August 15, 1848, the first U.S. patent for a dental chair with adjustable elevation and tilt of the seat and back was issued to M.W. Hanchett of New York. 

Image Credit: Dental Assistant.
Image Credit: Dental Assistant.

He attached a neck extension to a four-legged chair. Further, the chair included a footrest with adjustable elevation.


Since, then dental chair has evolved considerably. However, some recent discoveries have revealed that dental techniques today are pretty similar to the techniques used over 14,000 years ago. The only difference is that then the tools made out of chipped rocks rather than metal.

Sources: TodayInSci

Patent Information
Publication number: US5711 A
Patent Title: Improvement in surgical or dental operating-chairs
Publication type: Grant
Publication date: 15 Aug 1848
Inventors: M. Waldo Hanchett