Granted Patent
Utility
US 5,058,341 · App. 07/509,816
Method for constructing fire-stop collar assembly and apparatus thereof
Inventor:
Jerry R. Harbeke, Jr.
Patented Case
View Patent ↗
Granted: Oct 22, 1991
Filed: Apr 17, 1990
Inventor
Jerry R. Harbeke, Jr.
Assignee (at issue)
MSP Products, 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.