Charles Fleischer patented a toy egg adapted for pulling, stretching, and bouncing which includes two intertwined helically cut shells.
Patent Information
Publication number: US4219959 A
Patent Title: Toy Egg
Publication type: Grant
Application number: US 06/044,522
Publication date: Sep 2, 1980
Filing date: Jun 1, 1979
Priority date: Jun 1, 1979
Inventors: Charles J. Fleischer
Original Assignee: Fleischer Charles J