Landmarks of Human Thought I - Catalog - Page 35
FARNSWORTH Philo Taylor:
Television System. Patent No.
1,773,980.
Application filed January 07, 1927;
patented August 26, 1930.
Washington D.C.: United States
Patent Office [1930].
Folio (275 x 188 mm) 9 pp. [1r] –
[5r] text, double column, [5v] blank,
four leaves of diagrams printed on
verso only.