Granted Patent
Utility
US 4,747,897 · App. 07/034,285
Dielectric materials
Inventor:
Daniel D. Johnson
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Apr 2, 1987
Inventor
Daniel D. Johnson
Assignee (at issue)
W. L. Gore & Associates, 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.