Granted Patent
Utility
US 5,148,434 · App. 07/519,883
Digital data generator
Inventor:
Mark Richardson
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: May 7, 1990
Inventor
Mark Richardson
Assignee (at issue)
Schlumberger Industires, S.A.
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.