Granted Patent
Utility
US 4,292,633 · App. 05/963,194
Two-wire isolated signal transmitter
Inventors:
Perry H. Goodwin, Jr., Richard J. Kotalik
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Nov 24, 1978
Inventors
Perry H. Goodwin, Jr.
Richard J. Kotalik
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE 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.