Granted Patent
Utility
US 5,189,355 · App. 07/866,695
Interactive rotary controller system with tactile feedback
Inventors:
David N. Larkins, Glenn T. Yoshida, Thomas L. Helmers
Patented Case
View Patent ↗
Granted: Feb 23, 1993
Filed: Apr 10, 1992
Inventors
David N. Larkins
Glenn T. Yoshida
Thomas L. Helmers
Assignee (at issue)
Ampex 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.