Jennings held patents for a variety of inventions, including the friction match and a threshing machine. This one, for a “Vapor Burner,” related to lamps and lighting.
Packard’s improvement in “Cooking Utensils,” her only patented invention, included a new design for a frying pan using rounded recesses to keep eggs in place on the pan while cooking.
Rennie described her only patented invention, for a “Dust Pan,” as having a “peculiar construction” which would assist with “Sweeping Stairs and Floors of Apartments.”
Parmelee’s “Artificial Leg” included an atmospheric pressure-conforming rubber bucket molded from the patient’s remaining limb. Parmelee held several patents using India-rubber.
Description
Patent model for DuBois D. Parmelee, “Improvement in Artificial Legs,” U.S. Patent 37,737 (Feb. 10, 1863). Dubois Duncan Parmalee (1829-1897) was a chemist and inventor in New York City.
Sewing Machine Patent model, Improvement in Sewing Machines, 1873. Helen A. Blanchard, of Boston, Massachusetts. Patent No. 141987 Issued August 19, 1873. This patent model for an improvement in sewing machines introduced the buttonhole stitch. Blanchard received some twenty-eight patents, many having to do with sewing. She is best remembered for inventing the zigzag overstitch sewing machine.