Granted Patent
Utility
US 4,642,772 · App. 06/793,311
System for determining time duration of angular rotation
Inventor:
Paul Dackow
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: Oct 31, 1985
Inventor
Paul Dackow
Assignee (at issue)
RCA Corporation
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.