The central heating furnace design and style that Alice H. Parker patented in December 1919 built usage of pure gas for The very first time to help keep properties warm and toasty. Inspiring her innovation: the minimal performance of fireplaces (together with the smoke and ash they develop) in the https://inventor00864.bloguetechno.com/the-smart-trick-of-inventor-that-no-one-is-discussing-68536098