Granted Patent
Utility
US 5,771,540 · App. 08/785,927
Equilibrated hinge with variable frictional torque
Inventors:
David A. Carpenter, Mikhail Gelfand, Edward T. Rude
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Jan 22, 1997
Inventors
David A. Carpenter
Mikhail Gelfand
Edward T. Rude
Assignee (at issue)
Torq-Masters, 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.