Box 1
Container
Contains 2 Results:
Invention Documents
File — Box: 1, Folder: 1
Identifier: 94-129
Scope and Contents
McDonald prepared the collection of drawings, schematics, explanations, pictures, and an original patent to detail his invention, the "Gravigate," a gate opened by a combination of gravity and electromagnetics.
Dates:
June 5, 1910 to April 3, 1995
Tape of Invention
Item — Box: 1, Object: 1
Identifier: 94-129
Scope and Contents
An instructional videotape that shows the operation of McDonald's invention.
Dates:
June 5, 1910 to April 3, 1995
