Granted Patent
Utility
US 4,297,649 · App. 06/053,280
Malfunction detector for a group of cyclically interconnected phase-locked oscillators
Inventors:
Anes Sbuelz, Francesco Marchelli
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Jun 29, 1979
Inventors
Anes Sbuelz
Francesco Marchelli
Assignee (at issue)
Societa Italiana Telecomunicazioni Siemens 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.