Granted Patent
Utility
US 5,155,455 · App. 07/663,869
AM/FM modulator in which AM can be converted to FM by vector addition
Inventors:
Nicholas P. Cowley, Ian Watson
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Apr 1, 1991
Inventors
Nicholas P. Cowley
Ian Watson
Assignee (at issue)
Plessey Overseas Limited
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.