Granted Patent
Utility
US 4,279,021 · App. 06/012,400
Portable data entry apparatus including plural selectable functional configurations
Inventors:
Gary G. See, Robert J. Robbins
Patented Case
View Patent ↗
Granted: Jul 14, 1981
Filed: Feb 15, 1979
Inventors
Gary G. See
Robert J. Robbins
Assignee (at issue)
TELXON 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.