Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. There are no patent drawings available. This patent is in the database for reference only.

The original copy of this patent has become available for sale with the following text:

“Whereas Isaac Robinson a citizen of the United States hath alleged that he has invented a new and useful improvement in the mode of Softening Hides and Skins for Tanning & Dressing which improvement he states has not been known or used before his application … These are therefore to grant, according to law, to the said Isaac Robinson his heirs, administrators or assigns, for the term of fourteen years, from the eighteenth day of March one thousand eight hundred and thirty four the full and exclusive right and liberty of making, constructing, using and vending to others to be used, the said improvement; a description whereof is given in the words of the said Isaac Robinson himself, in the schedule hereto annexed, and is made party of these presents…”

(To be filled in.)

University Archives