Granted Patent
Utility
US 4,375,017 · App. 06/134,214
Calculator type keyboard including printed circuit board contacts and method of forming
Inventor:
Theodore D. Smith
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: Mar 26, 1980
Inventor
Theodore D. Smith
Assignee (at issue)
RCA 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.