Granted Patent
Utility
US 5,122,654 · App. 07/529,226
Ergonomic thumb-actuated trackball combined with control switches
Inventors:
Kanae H. Koh, Josef Bismanovsky
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: May 25, 1990
Inventors
Kanae H. Koh
Josef Bismanovsky
Assignee (at issue)
LOGITECH, 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.