Granted Patent
Utility
US 4,137,466 · App. 05/858,266
Controllable electronic resistance device
Inventors:
Hans-Robert Schemmel, Ingo Reichelt
Patented Case
View Patent ↗
Granted: Jan 30, 1979
Filed: Dec 7, 1977
Inventors
Hans-Robert Schemmel
Ingo Reichelt
Assignee (at issue)
U.S. Philips Corporation
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.