Granted Patent
Utility
US 5,898,359 · App. 08/994,113
Diffusion-barrier materials for thick-film piezoresistors and sensors formed therewith
Inventor:
Marion Edmond Ellis
Patented Case
View Patent ↗
Granted: Apr 27, 1999
Filed: Dec 19, 1997
Inventor
Marion Edmond Ellis
Assignee (at issue)
DELCO ELECTRONICS CORPORATION
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.