Granted Patent
Utility
US 5,335,513 · App. 08/006,235
Apparatus and method for detecting characteristics of a working fluid
Inventors:
Chester D. Campbell, Sandra L. Harper, Virender Jain, Richard L. Kenyon, Alan Matthies, Roy M. Yabuki
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Jan 19, 1993
Inventors
Chester D. Campbell
Sandra L. Harper
Virender Jain
Richard L. Kenyon
Alan Matthies
Roy M. Yabuki
Assignee (at issue)
Parker-Hannifin Corporation
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.