Granted Patent
Utility
US 4,630,221 · App. 06/629,086
Zone condition controller and method of using same
Inventors:
Terry A. Heckenbach, Henry A. Gleason, III
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Jul 9, 1984
Inventors
Terry A. Heckenbach
Henry A. Gleason, III
Assignee (at issue)
Johnson Service 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.