Granted Patent
Utility
US 4,258,317 · App. 06/029,569
Combination analog-digital indicator
Inventor:
Thomas A. Dubauskas
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Apr 12, 1979
Inventor
Thomas A. Dubauskas
Assignee (at issue)
The Lewis Engineering 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.