Granted Patent
Utility
US 4,418,684 · App. 06/293,998
Roof aperture system for selective collection and control of solar energy for building heating, cooling and daylighting
Inventors:
William Sanders, Marvin K. Snyder, James W. Harter
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Aug 18, 1981
Inventors
William Sanders
Marvin K. Snyder
James W. Harter
Assignee (at issue)
BUTLER MANUFACTURING COMPANY
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.