Granted Patent
Utility
US 4,683,942 · App. 06/912,282
Assembly for retrofitting two air handling units to an installation originally meant for a single unit
Inventors:
James A. Bierkamp, Scott Hall, Wade W. Smith
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Sep 29, 1986
Inventors
James A. Bierkamp
Scott Hall
Wade W. Smith
Assignee (at issue)
American Standard Inc.
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.