Granted Patent
Utility
US 4,379,480 · App. 06/168,537
Energy efficient garage door construction and the like
Inventors:
John J. Kempel, Ronald F. Otto
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: Jul 14, 1980
Inventors
John J. Kempel
Ronald F. Otto
Assignee (at issue)
Garland Manufacturing Co.
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.