Granted Patent
Utility
US 4,767,033 · App. 07/144,586
Manually operated gear pump spray head
Inventor:
Edward C. Gemperle
Patented Case
View Patent ↗
Granted: Aug 30, 1988
Filed: Jan 6, 1988
Inventor
Edward C. Gemperle
Assignee (at issue)
The Drackett 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.