Granted Patent
Utility
US 4,128,744 · App. 05/771,016
Keyboard with concave and convex domes
Inventor:
Richard E. Seeger
Patented Case
View Patent ↗
Granted: Dec 5, 1978
Filed: Feb 22, 1977
Inventor
Richard E. Seeger
Assignee (at issue)
Chomerics, 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.