The art of invention
Subtitle: patent models and their makers
By: William and Marlys Ray ; foreword by Peter Goldmark.
Contributors: Ray, Marlys.
Edition: 1st ed.
Publisher: Pyne Press
Published: 1974
Place of publication: Princeton
Language: eng
Number of pages: 132
Subjects: Models (Patents) -- United States
Notes: Bibliography: p. 125.
Includes index.