Geraldine Holm Hoch US chemical engineer 1 of 1st women @ Pratt & Whitney, Northrop Grumman, Bendix Corp, Midwest Research Institute & Lockheed Martin. Patented corrosion prevention systems for Lockheed L-1011 TriStar, used on Boeing 747 b #OTD 10 Jun 1924 en.wikipedia.org/wiki/Geraldi...