Granted Patent
Utility
US 4,450,786 · App. 06/466,995
Grooved gas gate
Inventors:
Joachim Doehler, David A. Gattuso, Kevin Hoffman
Patented Case
View Patent ↗
Granted: May 29, 1984
Filed: Feb 16, 1983
Inventors
Joachim Doehler
David A. Gattuso
Kevin Hoffman
Assignee (at issue)
Energy Conversion Devices, 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.