Granted Patent
Utility
US 5,127,661 · App. 07/691,574
Fluid seal
Inventors:
David C. Franson, Mark A. Kavanaugh, Wallace K. Snead
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Apr 25, 1991
Inventors
David C. Franson
Mark A. Kavanaugh
Wallace K. Snead
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.