Granted Patent
Utility
US 4,467,394 · App. 06/527,531
Three plate silicon-glass-silicon capacitive pressure transducer
Inventors:
Daniel H. Grantham, James L. Swindal
Patented Case
View Patent ↗
Granted: Aug 21, 1984
Filed: Aug 29, 1983
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.