Granted Patent
Utility
US 4,558,355 · App. 06/561,333
Trilevel sandcastle pulse encoder
Inventor:
James Hettiger
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Dec 14, 1983
Inventor
James Hettiger
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.