Granted Patent
Utility
US 4,679,587 · App. 06/917,858
Leak detector with two stage piston chamber
Inventor:
Klaus D. Jarr
Patented Case
View Patent ↗
Granted: Jul 14, 1987
Filed: Oct 14, 1986
Inventor
Klaus D. Jarr
Assignee (at issue)
The Marley-Wylain 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.