Granted Patent
Utility
US 4,483,634 · App. 06/513,124
Keyboard arrangement
Inventors:
Werner Frey, Johannes Rometsch, Hans Diem
Patented Case
View Patent ↗
Granted: Nov 20, 1984
Filed: Jul 13, 1983
Inventors
Werner Frey
Johannes Rometsch
Hans Diem
Assignee (at issue)
International Standard Electric 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.