Granted Patent
Utility
US 5,100,541 · App. 07/502,041
In-line debris trap for swimming pool filtration system
Inventor:
Dieter H. F. Kallenbach
Patented Case
View Patent ↗
Granted: Mar 31, 1992
Filed: Mar 30, 1990
Inventor
Dieter H. F. Kallenbach
Assignee (at issue)
Zarina Holdings C.V.
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.