Honor American innovation in aviation with this 160-page journal featuring a Black Hawk helicopter patent print on the cover. The detailed illustration highlights the engineering precision behind one of the most recognized aircraft in military history. Ideal for notes, sketches, or reflections, this journal blends everyday function with a tribute to the technological advancements that have shaped America. A distinctive and functional keepsake for aviation enthusiasts, members of the military, and admirers of American design.

The Patent Act of 1790 established the rules for submitting a patent application. Each application had to be submitted with specifications, a patent drawing, and, if possible, a model of the invention. Eventually, models were no longer required.

The National Archives holds nearly three million patent case files from 1836 to 1956.