This collection contains patents issued to inventors in Lancaster County. The patents have the technical information about the invention and also drawings and/or blueprints. Some of the patents are for a horse hay rake, pinions, a railroad car brake, and improvements in threshing machines, balancing mill stones, kitchen slicing utensils and a still. Two of the documents are signed by Secretary of State Henry Clay and President Andrew Jackson.
This collection contains patents granted to David Pollock and John Pollock for a fan blower, improved ore cleaner, improved feed water heater for locomotives, and an improved rack for holding implements and utensils. There are also related documents, such as correspondence, advertising, an application, and a petition.