Granted Patent
Utility
US 5,125,809 · App. 07/499,765
Wobble plate pump
Inventors:
E. Dale Hartley, F. Scott Hartley
Patented Case
View Patent ↗
Granted: Jun 30, 1992
Filed: Mar 27, 1990
Inventors
E. Dale Hartley
F. Scott Hartley
Assignee (at issue)
Product Research and Development, Inc.
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.