US Patent 3,815,604 Inventors:
US Patent 3,884.237 Inventors:
Conor C. O'Malley MD & Joeseph Zappel Engineer May 20, 1975
US Patent 3,884,238 Inventors:
Conor C. O'Malley MD & Ralph M. Heintz Sr. May 20, 1975
A comprehensive History of Vitrectomy and Vitrectomy inventions by Steve Charles MD