Granted Patent
Utility
US 4,523,291 · App. 06/391,869
Device for estimating the operating frequency of a source of recurrent signals
Inventors:
Marco Giubbolini, Walter Marziali
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Jun 24, 1982
Inventors
Marco Giubbolini
Walter Marziali
Assignee (at issue)
Selenia Industrie Elettroniche Associate S.p.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.