Granted Patent
Utility
US 4,801,125 · App. 06/668,670
Valve body comprising sheet metal hemispheres and method for making same
Inventor:
Erich J. Kocher
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Nov 6, 1984
Inventor
Erich J. Kocher
Assignee (at issue)
Vilter Manufacturing LLC
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.