Granted Patent
Utility
US 5,181,771 · App. 07/662,738
Triple spring torque motor
Inventors:
Edward Robak, Carter K. Reh
Patented Case
View Patent ↗
Granted: Jan 26, 1993
Filed: Mar 1, 1991
Inventors
Edward Robak
Carter K. Reh
Assignee (at issue)
Sony Trans Com 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.