Saturday, September 30, 2006
Rothschild Petersen collection of patent models
From 1790 to 1880, anyone applying to the U.S. Patent Office was required to submit a working model of the invention. Patent models were to be no more than 12 inches square, with paperwork and diagrams explaining the item's purpose, construction and operation. Click to access over 700 models in the Rothschild Petersen collection.