Granted Patent
Utility
US 4,511,892 · App. 06/392,206
Variable refresh rate for stroke CRT displays
Inventor:
Steven P. Grothe
Patented Case
View Patent ↗
Granted: Apr 16, 1985
Filed: Jun 25, 1982
Inventor
Steven P. Grothe
Assignee (at issue)
Sperry Corp.
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.