Granted Patent
Utility
US 4,358,644 · App. 06/160,158
Bilateral current source for a multi-terminal intercom
Inventor:
Stanley L. Hubler
Patented Case
View Patent ↗
Granted: Nov 9, 1982
Filed: Jun 17, 1980
Inventor
Stanley L. Hubler
Assignee (at issue)
RTS Systems, Inc.
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.