Granted Patent
Utility
US 5,349,440 · App. 07/927,047
Interferometric laser profilometer including a multimode laser diode emitting a range of stable wavelengths
Inventor:
Peter J. DeGroot
Patented Case
View Patent ↗
Granted: Sep 20, 1994
Filed: Aug 7, 1992
Inventor
Peter J. DeGroot
Assignee (at issue)
Hughes Aircraft Company
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.