Granted Patent
Utility
US 3,942,421 · App. 05/524,780
Seal strips for fume hoods
Inventors:
Richard C. Tringali, Michael Turko
Patented Case
View Patent ↗
Granted: Mar 9, 1976
Filed: Nov 18, 1974
Inventors
Richard C. Tringali
Michael Turko
Assignee (at issue)
American Hospital Supply Corp.
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.