Inventor's manual, how to work a patent to make it pay; a guide for inventors, in perfecting their inventions, taking out their patents, and disposing of them, and cautions as to pitfalls for the unwary
A practical handbook by George M. Hopkins, revised by Albert A. Hopkins and published in New York in 1918, instructing inventors on drafting applications, filing patents, and selling rights. The plates are line-drawn patent figures: sectioned mechanisms, springs, levers, and household objects labeled with reference numbers, dashed hidden lines, and hand-lettered "Fig." captions useful as technical-diagram texture.
