Granted Patent
Utility
US 4,824,347 · App. 07/100,520
Internal gear machine with reinforced housing
Inventor:
Andrew N. Dlugokecki
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Sep 24, 1987
Inventor
Andrew N. Dlugokecki
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.