Inventions
Subject
Subject Source: Library of Congress Subject Headings
Found in 1 Collection or Record:
Robert Randolph McDonald Papers
Collection
Identifier: 0971
Scope and Contents
This collection consists of documents, newspaper articles, and pictures that chronicle the life of Robert Randlph McDonald and his invention, the "Gravigate." This includes pictures, schematics, the original patent, and a video explaining its mechanical operation.
Dates:
June 5, 1910 to April 3, 1995
