Granted Patent
Utility
US 4,680,577 · App. 06/854,687
Multipurpose cursor control keyswitch
Inventors:
David H. Straayer, Patrick J. Franz, Eugene F. Lynch
Patented Case
View Patent ↗
Granted: Jul 14, 1987
Filed: Apr 18, 1986
Inventors
David H. Straayer
Patrick J. Franz
Eugene F. Lynch
Assignee (at issue)
Tektronix, 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.