Granted Patent
Utility
US 5,159,374 · App. 07/680,203
Water sealing develop ring
Inventor:
Gary Groshong
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Apr 4, 1991
Inventor
Gary Groshong
Assignee (at issue)
VLSI Technology, 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.