It started with some sketches then moved to a wire coat hanger experiment. Martha was found with a wire coat hanger around her neck. There are two types of dies used&colon; T-shaped and coat hanger. The spokes may be made of stiff wire, brazing rods or even coat hanger wire. She then asked Joe for a coat hanger, to rig up a better antenna. The wire coat hanger was invented in 1869 by O. A. North of New Britain.