Granted Patent
Utility
US 4,769,887 · App. 07/047,205
Method of making a valve construction having means for aligning the valve member with the valve seat thereof
Inventor:
Harvey J. Shopsky
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: May 6, 1987
Inventor
Harvey J. Shopsky
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.