Granted Patent
Utility
US 4,294,786 · App. 06/026,274
Solar heat energy collecting systems and methods of making the same
Inventors:
Alan A. Graham, Laurence F. Haemer, Charles H. Miller
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Apr 2, 1979
Inventors
Alan A. Graham
Laurence F. Haemer
Charles H. Miller
Assignee (at issue)
CONGOLEUM CORPORATION
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.