Granted Patent
Utility
US 4,930,894 · App. 07/220,899
Minimum deadpath interferometer and dilatometer
Inventor:
Richard R. Baldwin
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Jul 14, 1988
Inventor
Richard R. Baldwin
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.