Hillsons Patent Model of a HotAir Furnace ca 1848. This model was filed with the application to the Patent Office for Patent Number 5,459 issued to Robert Hillson of Albany, New York on February 29, 1848. Mr. Hillson’s patent was for an improved design for hot air furnaces.

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Size: 1299px × 1924px
Photo credit: © SBS Eclectic Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: engineering, industry, work