US patent No. 46,115 granted to Charles Lang of Worcester, Massachusetts, for a machine that makes lace paper (the decorative paper used for doilies and valentines, not textile lace). Two rollers grind the raised parts off embossed paper pressed into a die. The scan has two sheets of drawings and a three-part specification with a single claim.

US Patent No. 53,991, granted April 17, 1866 to Charles Lang of New York, for a machine that turns plain paper into lace-paper. A foot-operated press embosses the paper between dies. A rotating, vibrating drum covered with ground glass or emery then grinds off the raised parts, and a sucking-blower removes the dust. The scan has three sheets of patent drawings (Figs. 1-5) and a two-page specification with three claims. The specification refers back to Lang's earlier patent No. 46,115 of January 31, 1865.