Granted Patent
Utility
US 4,998,179 · App. 07/317,236
Capacitive semiconductive sensor with hinged diaphragm for planar movement
Inventors:
Daniel H. Grantham, James L. Swindal
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Feb 28, 1989
Inventors
Daniel H. Grantham
James L. Swindal
Assignee (at issue)
UNITED TECHNOLOGIES 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.